56513431 has 16 divisors (see below), whose sum is σ = 63403200. Its totient is φ = 50310624.

The previous prime is 56513417. The next prime is 56513437. The reversal of 56513431 is 13431565.

It is not a de Polignac number, because 56513431 - 2⁹ = 56512919 is a prime.

It is a super-2 number, since 2×56513431² = 6387535766783522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56513431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56513437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63270 + ... + 64156.

It is an arithmetic number, because the mean of its divisors is an integer number (3962700).

Almost surely, 2^56513431 is an apocalyptic number.

56513431 is a deficient number, since it is larger than the sum of its proper divisors (6889769).

56513431 is an equidigital number, since it uses as much as digits as its factorization.

56513431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955 (or 929 counting only the distinct ones).

The product of its digits is 5400, while the sum is 28.

The square root of 56513431 is about 7517.5415529281. The cubic root of 56513431 is about 383.7519172168.

Adding to 56513431 its reverse (13431565), we get a palindrome (69944996).

The spelling of 56513431 in words is "fifty-six million, five hundred thirteen thousand, four hundred thirty-one".