56139171 has 16 divisors (see below), whose sum is σ = 84292608. Its totient is φ = 32925600.

The previous prime is 56139169. The next prime is 56139211. The reversal of 56139171 is 17193165.

It is a happy number.

It is not a de Polignac number, because 56139171 - 2¹ = 56139169 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (56139131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26416 + ... + 28461.

It is an arithmetic number, because the mean of its divisors is an integer number (5268288).

Almost surely, 2^56139171 is an apocalyptic number.

56139171 is a deficient number, since it is larger than the sum of its proper divisors (28153437).

56139171 is a wasteful number, since it uses less digits than its factorization.

56139171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54922.

The product of its digits is 5670, while the sum is 33.

The square root of 56139171 is about 7492.6077569829. The cubic root of 56139171 is about 382.9029083515.

The spelling of 56139171 in words is "fifty-six million, one hundred thirty-nine thousand, one hundred seventy-one".