56390171 has 4 divisors (see below), whose sum is σ = 56409744. Its totient is φ = 56370600.

The previous prime is 56390143. The next prime is 56390189. The reversal of 56390171 is 17109365.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56390171 - 2⁶ = 56390107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56390101) 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, 4520 + ... + 11541.

It is an arithmetic number, because the mean of its divisors is an integer number (14102436).

Almost surely, 2^56390171 is an apocalyptic number.

56390171 is a deficient number, since it is larger than the sum of its proper divisors (19573).

56390171 is a wasteful number, since it uses less digits than its factorization.

56390171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19572.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 56390171 is about 7509.3389189728. The cubic root of 56390171 is about 383.4727169665.

The spelling of 56390171 in words is "fifty-six million, three hundred ninety thousand, one hundred seventy-one".