13257515523 has 8 divisors (see below), whose sum is σ = 20201928448. Its totient is φ = 7575723144.

The previous prime is 13257515483. The next prime is 13257515533. The reversal of 13257515523 is 32551575231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13257515523 - 2³² = 8962548227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13257515533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315655111 + ... + 315655152.

It is an arithmetic number, because the mean of its divisors is an integer number (2525241056).

Almost surely, 2^13257515523 is an apocalyptic number.

13257515523 is a deficient number, since it is larger than the sum of its proper divisors (6944412925).

13257515523 is an equidigital number, since it uses as much as digits as its factorization.

13257515523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631310273.

The product of its digits is 157500, while the sum is 39.

The spelling of 13257515523 in words is "thirteen billion, two hundred fifty-seven million, five hundred fifteen thousand, five hundred twenty-three".