105513

105513 is a number that belongs to the set of natural numbers. It is an odd number, meaning it is not divisible by 2. The number 105513 can be expressed as a sum of two squares in two different ways: 105513 = 322^2 + 1^2 and 105513 = 318^2 + 6^2. This property makes it a sum of two squares number.

The prime factorization of 105513 is 3^1 x 7^1 x 13^1 x 103^1. This means that 105513 is a product of these four prime numbers. The sum of the divisors of 105513 is 211024, which is greater than 105513 itself, indicating that it is an abundant number.

In the field of cryptography, 105513 is used as a modulus in certain algorithms. It is part of the RSA-155, a semiprime number that was once used in the RSA algorithm for secure data transmission. However, due to its relatively small size and the advances in computing power, RSA-155 is no longer considered secure for practical use.

The number 105513 appears in the sequence of Fibonacci numbers, where it is the 21st Fibonacci number. It is also the sum of the first 21 Fibonacci numbers. The number of digits in 105513 is 6, and the sum of its digits is 19. The number 105513 is not a perfect square, but it is the sum of two squares.