56431161 has 40 divisors (see below), whose sum is σ = 87863424. Its totient is φ = 36216720.

The previous prime is 56431147. The next prime is 56431163. The reversal of 56431161 is 16113465.

56431161 is a `hidden beast` number, since 5 + 643 + 1 + 16 + 1 = 666.

56431161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56431161 - 2⁶ = 56431097 is a prime.

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

Its product of digits (2160) is a multiple of the sum of its prime factors (135).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56431163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 925071 + ... + 925131.

Almost surely, 2^56431161 is an apocalyptic number.

It is an amenable number.

56431161 is a deficient number, since it is larger than the sum of its proper divisors (31432263).

56431161 is an frugal number, since it uses more digits than its factorization.

56431161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 111 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 56431161 is about 7512.0676913883. The cubic root of 56431161 is about 383.5656098668.

The spelling of 56431161 in words is "fifty-six million, four hundred thirty-one thousand, one hundred sixty-one".