113520523513 has 4 divisors (see below), whose sum is σ = 114108712948. Its totient is φ = 112932334080.

The previous prime is 113520523507. The next prime is 113520523531. The reversal of 113520523513 is 315325025311.

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 12162340089 + 101358183424 = 110283^2 + 318368^2 .

It is a cyclic number.

It is not a de Polignac number, because 113520523513 - 2³³ = 104930588921 is a prime.

It is a super-2 number, since 2×113520523513² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113520523913) 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, 294094428 + ... + 294094813.

It is an arithmetic number, because the mean of its divisors is an integer number (28527178237).

Almost surely, 2^113520523513 is an apocalyptic number.

It is an amenable number.

113520523513 is a deficient number, since it is larger than the sum of its proper divisors (588189435).

113520523513 is an equidigital number, since it uses as much as digits as its factorization.

113520523513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588189434.

The product of its (nonzero) digits is 13500, while the sum is 31.

Adding to 113520523513 its reverse (315325025311), we get a palindrome (428845548824).

The spelling of 113520523513 in words is "one hundred thirteen billion, five hundred twenty million, five hundred twenty-three thousand, five hundred thirteen".