56345531 has 16 divisors (see below), whose sum is σ = 66199680. Its totient is φ = 47383680.

The previous prime is 56345503. The next prime is 56345533. The reversal of 56345531 is 13554365.

It is a cyclic number.

It is not a de Polignac number, because 56345531 - 2⁶ = 56345467 is a prime.

It is a super-2 number, since 2×56345531² = 6349637727343922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56345533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8480 + ... + 13586.

It is an arithmetic number, because the mean of its divisors is an integer number (4137480).

Almost surely, 2^56345531 is an apocalyptic number.

56345531 is a deficient number, since it is larger than the sum of its proper divisors (9854149).

56345531 is a wasteful number, since it uses less digits than its factorization.

56345531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5194.

The product of its digits is 27000, while the sum is 32.

The square root of 56345531 is about 7506.3660315761. The cubic root of 56345531 is about 383.3715010935.

Adding to 56345531 its reverse (13554365), we get a palindrome (69899896).

The spelling of 56345531 in words is "fifty-six million, three hundred forty-five thousand, five hundred thirty-one".