56289331 has 4 divisors (see below), whose sum is σ = 64330672. Its totient is φ = 48247992.

The previous prime is 56289323. The next prime is 56289347. The reversal of 56289331 is 13398265.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13398265 = 5 ⋅2679653.

It is a cyclic number.

It is not a de Polignac number, because 56289331 - 2³ = 56289323 is a prime.

It is a super-2 number, since 2×56289331² = 6336977568855122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56289731) 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, 4020660 + ... + 4020673.

It is an arithmetic number, because the mean of its divisors is an integer number (16082668).

Almost surely, 2^56289331 is an apocalyptic number.

56289331 is a deficient number, since it is larger than the sum of its proper divisors (8041341).

56289331 is an equidigital number, since it uses as much as digits as its factorization.

56289331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8041340.

The product of its digits is 38880, while the sum is 37.

The square root of 56289331 is about 7502.6216084779. The cubic root of 56289331 is about 383.2439982539.

The spelling of 56289331 in words is "fifty-six million, two hundred eighty-nine thousand, three hundred thirty-one".