55165131 has 72 divisors (see below), whose sum is σ = 99341424. Its totient is φ = 30481920.

The previous prime is 55165127. The next prime is 55165133. The reversal of 55165131 is 13156155.

55165131 is a `hidden beast` number, since 5 + 5 + 1 + 651 + 3 + 1 = 666.

It is not a de Polignac number, because 55165131 - 2² = 55165127 is a prime.

It is a super-2 number, since 2×55165131² = 6086383356494322, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 55165095 and 55165104.

It is not an unprimeable number, because it can be changed into a prime (55165133) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 488131 + ... + 488243.

It is an arithmetic number, because the mean of its divisors is an integer number (1379742).

Almost surely, 2^55165131 is an apocalyptic number.

55165131 is a deficient number, since it is larger than the sum of its proper divisors (44176293).

55165131 is a wasteful number, since it uses less digits than its factorization.

55165131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 164 counting only the distinct ones).

The product of its digits is 2250, while the sum is 27.

The square root of 55165131 is about 7427.3232728891. The cubic root of 55165131 is about 380.6754629883.

The spelling of 55165131 in words is "fifty-five million, one hundred sixty-five thousand, one hundred thirty-one".