56531213 has 8 divisors (see below), whose sum is σ = 59579520. Its totient is φ = 53490240.

The previous prime is 56531207. The next prime is 56531219. The reversal of 56531213 is 31213565.

It is an interprime number because it is at equal distance from previous prime (56531207) and next prime (56531219).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56531213 - 2⁶ = 56531149 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 (56531219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22181 + ... + 24597.

It is an arithmetic number, because the mean of its divisors is an integer number (7447440).

Almost surely, 2^56531213 is an apocalyptic number.

It is an amenable number.

56531213 is a deficient number, since it is larger than the sum of its proper divisors (3048307).

56531213 is a wasteful number, since it uses less digits than its factorization.

56531213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3667.

The product of its digits is 2700, while the sum is 26.

The square root of 56531213 is about 7518.7241603879. The cubic root of 56531213 is about 383.7921622870.

Adding to 56531213 its reverse (31213565), we get a palindrome (87744778).

The spelling of 56531213 in words is "fifty-six million, five hundred thirty-one thousand, two hundred thirteen".