56313131 has 32 divisors (see below), whose sum is σ = 72576000. Its totient is φ = 42577920.

The previous prime is 56313119. The next prime is 56313133. The reversal of 56313131 is 13131365.

It is a happy number.

It is not a de Polignac number, because 56313131 - 2⁶ = 56313067 is a prime.

It is a super-2 number, since 2×56313131² = 6342337446046322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 56313097 and 56313106.

It is not an unprimeable number, because it can be changed into a prime (56313133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125195 + ... + 125643.

It is an arithmetic number, because the mean of its divisors is an integer number (2268000).

Almost surely, 2^56313131 is an apocalyptic number.

56313131 is a deficient number, since it is larger than the sum of its proper divisors (16262869).

56313131 is a wasteful number, since it uses less digits than its factorization.

56313131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539.

The product of its digits is 810, while the sum is 23.

The square root of 56313131 is about 7504.2075530998. The cubic root of 56313131 is about 383.2980044736.

Adding to 56313131 its reverse (13131365), we get a palindrome (69444496).

It can be divided in two parts, 5 and 6313131, that added together give a palindrome (6313136).

The spelling of 56313131 in words is "fifty-six million, three hundred thirteen thousand, one hundred thirty-one".