0x31111111

0x31111111 is a hexadecimal literal that represents the 32-bit unsigned integer 0x31111111. In decimal, this value is 823,202,065.

The binary form is 0011 0001 0001 0001 0001 0001 0001 0001. As a 32-bit value, it is stored as the four bytes 0x31, 0x11, 0x11, 0x11 in big-endian order, or 0x11, 0x11, 0x11, 0x31 in little-endian order. This distinction matters for how the value is interpreted when read from memory on different architectures.

In practice, 0x31111111 is mainly used as a simple, nonzero constant or test pattern in examples and demonstrations. It is not a widely recognized magic number, file signature, or blockchain address, and it does not correspond to a known standard format.

Arithmetic properties of the value include its divisibility by 5, since the decimal representation ends in 5. Specifically, 823,202,065 = 5 × 164,640,413. It is an odd number and not divisible by 3, based on digit-sum checks. The hex pattern—a leading 3 followed by seven 1s—provides a distinctive, easily recognizable character that can aid in testing parsing, formatting, and debugging of hex literals.

See also: hexadecimal notation, endianness, magic numbers in file formats.

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