56313509 has 4 divisors (see below), whose sum is σ = 64358304. Its totient is φ = 48268716.

The previous prime is 56313497. The next prime is 56313533. The reversal of 56313509 is 90531365.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56313509 - 2⁴ = 56313493 is a prime.

It is a super-2 number, since 2×56313509² = 6342422591786162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56313539) 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, 4022387 + ... + 4022400.

It is an arithmetic number, because the mean of its divisors is an integer number (16089576).

Almost surely, 2^56313509 is an apocalyptic number.

It is an amenable number.

56313509 is a deficient number, since it is larger than the sum of its proper divisors (8044795).

56313509 is an equidigital number, since it uses as much as digits as its factorization.

56313509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8044794.

The product of its (nonzero) digits is 12150, while the sum is 32.

The square root of 56313509 is about 7504.2327389281. The cubic root of 56313509 is about 383.2988620967.

The spelling of 56313509 in words is "fifty-six million, three hundred thirteen thousand, five hundred nine".