56431901 has 4 divisors (see below), whose sum is σ = 56674332. Its totient is φ = 56189472.

The previous prime is 56431877. The next prime is 56431927. The reversal of 56431901 is 10913465.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4519876 + 51912025 = 2126^2 + 7205^2 .

It is a cyclic number.

It is not a de Polignac number, because 56431901 - 2¹⁰ = 56430877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56431931) 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, 120866 + ... + 121331.

It is an arithmetic number, because the mean of its divisors is an integer number (14168583).

Almost surely, 2^56431901 is an apocalyptic number.

It is an amenable number.

56431901 is a deficient number, since it is larger than the sum of its proper divisors (242431).

56431901 is a wasteful number, since it uses less digits than its factorization.

56431901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242430.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 56431901 is about 7512.1169453091. The cubic root of 56431901 is about 383.5672864660.

The spelling of 56431901 in words is "fifty-six million, four hundred thirty-one thousand, nine hundred one".