13055931 has 32 divisors (see below), whose sum is σ = 22714880. Its totient is φ = 7255008.

The previous prime is 13055923. The next prime is 13055947. The reversal of 13055931 is 13955031.

It is not a de Polignac number, because 13055931 - 2³ = 13055923 is a prime.

It is a super-2 number, since 2×13055931² = 340914668553522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13055895 and 13055904.

It is not an unprimeable number, because it can be changed into a prime (13055951) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6060 + ... + 7926.

It is an arithmetic number, because the mean of its divisors is an integer number (709840).

Almost surely, 2^13055931 is an apocalyptic number.

13055931 is a deficient number, since it is larger than the sum of its proper divisors (9658949).

13055931 is a wasteful number, since it uses less digits than its factorization.

13055931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920 (or 1914 counting only the distinct ones).

The product of its (nonzero) digits is 2025, while the sum is 27.

The square root of 13055931 is about 3613.2991849555. The cubic root of 13055931 is about 235.4701978596.

The spelling of 13055931 in words is "thirteen million, fifty-five thousand, nine hundred thirty-one".