56172705 has 16 divisors (see below), whose sum is σ = 89969280. Its totient is φ = 29927808.

The previous prime is 56172703. The next prime is 56172719. The reversal of 56172705 is 50727165.

It is not a de Polignac number, because 56172705 - 2¹ = 56172703 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56172703) 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, 27189 + ... + 29181.

It is an arithmetic number, because the mean of its divisors is an integer number (5623080).

Almost surely, 2^56172705 is an apocalyptic number.

It is an amenable number.

56172705 is a deficient number, since it is larger than the sum of its proper divisors (33796575).

56172705 is a wasteful number, since it uses less digits than its factorization.

56172705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3880.

The product of its (nonzero) digits is 14700, while the sum is 33.

The square root of 56172705 is about 7494.8452285554. The cubic root of 56172705 is about 382.9791338586.

The spelling of 56172705 in words is "fifty-six million, one hundred seventy-two thousand, seven hundred five".