56217228 has 24 divisors (see below), whose sum is σ = 132756288. Its totient is φ = 18512976.

The previous prime is 56217197. The next prime is 56217241. The reversal of 56217228 is 82271265.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27226 + ... + 29217.

It is an arithmetic number, because the mean of its divisors is an integer number (5531512).

Almost surely, 2^56217228 is an apocalyptic number.

It is an amenable number.

56217228 is an abundant number, since it is smaller than the sum of its proper divisors (76539060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56217228 is a wasteful number, since it uses less digits than its factorization.

56217228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56533 (or 56531 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 56217228 is about 7497.8148816839. The cubic root of 56217228 is about 383.0802913925.

The spelling of 56217228 in words is "fifty-six million, two hundred seventeen thousand, two hundred twenty-eight".