115213613 has 4 divisors (see below), whose sum is σ = 115322460. Its totient is φ = 115104768.

The previous prime is 115213603. The next prime is 115213643. The reversal of 115213613 is 316312511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69272329 + 45941284 = 8323^2 + 6778^2 .

It is a cyclic number.

It is not a de Polignac number, because 115213613 - 2¹⁸ = 114951469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115213603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52820 + ... + 54957.

It is an arithmetic number, because the mean of its divisors is an integer number (28830615).

Almost surely, 2^115213613 is an apocalyptic number.

It is an amenable number.

115213613 is a deficient number, since it is larger than the sum of its proper divisors (108847).

115213613 is a wasteful number, since it uses less digits than its factorization.

115213613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108846.

The product of its digits is 540, while the sum is 23.

The square root of 115213613 is about 10733.7604314611. The cubic root of 115213613 is about 486.5953248669.

The spelling of 115213613 in words is "one hundred fifteen million, two hundred thirteen thousand, six hundred thirteen".