56309331 has 16 divisors (see below), whose sum is σ = 85111040. Its totient is φ = 32827680.

The previous prime is 56309327. The next prime is 56309333. The reversal of 56309331 is 13390365.

It is not a de Polignac number, because 56309331 - 2² = 56309327 is a prime.

It is a super-2 number, since 2×56309331² = 6341481515335122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56309333) 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, 37255 + ... + 38736.

It is an arithmetic number, because the mean of its divisors is an integer number (5319440).

Almost surely, 2^56309331 is an apocalyptic number.

56309331 is a deficient number, since it is larger than the sum of its proper divisors (28801709).

56309331 is a wasteful number, since it uses less digits than its factorization.

56309331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76026.

The product of its (nonzero) digits is 7290, while the sum is 30.

The square root of 56309331 is about 7503.9543575371. The cubic root of 56309331 is about 383.2893826527.

Adding to 56309331 its reverse (13390365), we get a palindrome (69699696).

The spelling of 56309331 in words is "fifty-six million, three hundred nine thousand, three hundred thirty-one".