56681224 has 16 divisors (see below), whose sum is σ = 108749520. Its totient is φ = 27681360.

The previous prime is 56681203. The next prime is 56681257. The reversal of 56681224 is 42218665.

It is a super-2 number, since 2×56681224² = 6425522308276352, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56681224.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82042 + ... + 82729.

It is an arithmetic number, because the mean of its divisors is an integer number (6796845).

Almost surely, 2^56681224 is an apocalyptic number.

It is an amenable number.

56681224 is a deficient number, since it is larger than the sum of its proper divisors (52068296).

56681224 is a wasteful number, since it uses less digits than its factorization.

56681224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164820 (or 164816 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 56681224 is about 7528.6933793322. The cubic root of 56681224 is about 384.1313388985.

Adding to 56681224 its reverse (42218665), we get a palindrome (98899889).

The spelling of 56681224 in words is "fifty-six million, six hundred eighty-one thousand, two hundred twenty-four".