56217538 has 16 divisors (see below), whose sum is σ = 96155640. Its totient is φ = 24420096.

The previous prime is 56217529. The next prime is 56217563. The reversal of 56217538 is 83571265.

It can be written as a sum of positive squares in 4 ways, for example, as 29560969 + 26656569 = 5437^2 + 5163^2 .

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 56217497 and 56217506.

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, 63153 + ... + 64036.

Almost surely, 2^56217538 is an apocalyptic number.

56217538 is a deficient number, since it is larger than the sum of its proper divisors (39938102).

56217538 is a wasteful number, since it uses less digits than its factorization.

56217538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127221.

The product of its digits is 50400, while the sum is 37.

The square root of 56217538 is about 7497.8355543450. The cubic root of 56217538 is about 383.0809955341.

The spelling of 56217538 in words is "fifty-six million, two hundred seventeen thousand, five hundred thirty-eight".