13156545431 has 4 divisors (see below), whose sum is σ = 13157163552. Its totient is φ = 13155927312.

The previous prime is 13156545407. The next prime is 13156545443. The reversal of 13156545431 is 13454565131.

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

It is a cyclic number.

It is not a de Polignac number, because 13156545431 - 2²⁶ = 13089436567 is a prime.

It is a super-2 number, since 2×13156545431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13156545401) 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, 275951 + ... + 320096.

It is an arithmetic number, because the mean of its divisors is an integer number (3289290888).

Almost surely, 2^13156545431 is an apocalyptic number.

13156545431 is a deficient number, since it is larger than the sum of its proper divisors (618121).

13156545431 is an equidigital number, since it uses as much as digits as its factorization.

13156545431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618120.

The product of its digits is 108000, while the sum is 38.

The spelling of 13156545431 in words is "thirteen billion, one hundred fifty-six million, five hundred forty-five thousand, four hundred thirty-one".