56302531 has 4 divisors (see below), whose sum is σ = 56440600. Its totient is φ = 56164464.

The previous prime is 56302517. The next prime is 56302537. The reversal of 56302531 is 13520365.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 56302531 - 2⁹ = 56302019 is a prime.

It is a super-2 number, since 2×56302531² = 6339949994011922, 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 = 56302496 and 56302505.

It is not an unprimeable number, because it can be changed into a prime (56302537) 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, 68421 + ... + 69238.

It is an arithmetic number, because the mean of its divisors is an integer number (14110150).

Almost surely, 2^56302531 is an apocalyptic number.

56302531 is a deficient number, since it is larger than the sum of its proper divisors (138069).

56302531 is a wasteful number, since it uses less digits than its factorization.

56302531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138068.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 56302531 is about 7503.5012494168. The cubic root of 56302531 is about 383.2739531631.

Adding to 56302531 its reverse (13520365), we get a palindrome (69822896).

The spelling of 56302531 in words is "fifty-six million, three hundred two thousand, five hundred thirty-one".