56031331 has 4 divisors (see below), whose sum is σ = 56315952. Its totient is φ = 55746712.

The previous prime is 56031319. The next prime is 56031347. The reversal of 56031331 is 13313065.

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 56031331 - 2¹³ = 56023139 is a prime.

It is a super-2 number, since 2×56031331² = 6279020107263122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56032331) 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, 142015 + ... + 142408.

It is an arithmetic number, because the mean of its divisors is an integer number (14078988).

Almost surely, 2^56031331 is an apocalyptic number.

56031331 is a deficient number, since it is larger than the sum of its proper divisors (284621).

56031331 is a wasteful number, since it uses less digits than its factorization.

56031331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284620.

The product of its (nonzero) digits is 810, while the sum is 22.

The square root of 56031331 is about 7485.4078713187. The cubic root of 56031331 is about 382.6575733081.

Adding to 56031331 its reverse (13313065), we get a palindrome (69344396).

The spelling of 56031331 in words is "fifty-six million, thirty-one thousand, three hundred thirty-one".