31545055523 has 4 divisors (see below), whose sum is σ = 31558814928. Its totient is φ = 31531296120.

The previous prime is 31545055513. The next prime is 31545055571. The reversal of 31545055523 is 32555054513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32555054513 = 43 ⋅757094291.

It is a cyclic number.

It is not a de Polignac number, because 31545055523 - 2¹² = 31545051427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31545055513) 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, 6876263 + ... + 6880848.

It is an arithmetic number, because the mean of its divisors is an integer number (7889703732).

Almost surely, 2^31545055523 is an apocalyptic number.

31545055523 is a deficient number, since it is larger than the sum of its proper divisors (13759405).

31545055523 is a wasteful number, since it uses less digits than its factorization.

31545055523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13759404.

The product of its (nonzero) digits is 225000, while the sum is 38.

The spelling of 31545055523 in words is "thirty-one billion, five hundred forty-five million, fifty-five thousand, five hundred twenty-three".