56215377 has 28 divisors (see below), whose sum is σ = 85778640. Its totient is φ = 36813528.

The previous prime is 56215363. The next prime is 56215391. The reversal of 56215377 is 77351265.

It is an interprime number because it is at equal distance from previous prime (56215363) and next prime (56215391).

It is not a de Polignac number, because 56215377 - 2⁴ = 56215361 is a prime.

It is a super-2 number, since 2×56215377² = 6320337222504258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56215177) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 42358 + ... + 43664.

Almost surely, 2^56215377 is an apocalyptic number.

It is an amenable number.

56215377 is a deficient number, since it is larger than the sum of its proper divisors (29563263).

56215377 is an equidigital number, since it uses as much as digits as its factorization.

56215377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384 (or 1369 counting only the distinct ones).

The product of its digits is 44100, while the sum is 36.

The square root of 56215377 is about 7497.6914447048. The cubic root of 56215377 is about 383.0760869316.

The spelling of 56215377 in words is "fifty-six million, two hundred fifteen thousand, three hundred seventy-seven".