56401131 has 4 divisors (see below), whose sum is σ = 75201512. Its totient is φ = 37600752.

The previous prime is 56401123. The next prime is 56401141. The reversal of 56401131 is 13110465.

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

It is not a de Polignac number, because 56401131 - 2³ = 56401123 is a prime.

It is a super-2 number, since 2×56401131² = 6362175156158322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56401098 and 56401107.

It is not an unprimeable number, because it can be changed into a prime (56401141) 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, 9400186 + ... + 9400191.

It is an arithmetic number, because the mean of its divisors is an integer number (18800378).

Almost surely, 2^56401131 is an apocalyptic number.

56401131 is a deficient number, since it is larger than the sum of its proper divisors (18800381).

56401131 is a wasteful number, since it uses less digits than its factorization.

56401131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18800380.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 56401131 is about 7510.0686414972. The cubic root of 56401131 is about 383.4975592906.

Adding to 56401131 its reverse (13110465), we get a palindrome (69511596).

The spelling of 56401131 in words is "fifty-six million, four hundred one thousand, one hundred thirty-one".