56665224 has 128 divisors (see below), whose sum is σ = 196300800. Its totient is φ = 14713920.

The previous prime is 56665223. The next prime is 56665237. The reversal of 56665224 is 42256665.

It is a super-2 number, since 2×56665224² = 6421895221940352, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56665223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14929 + ... + 18335.

It is an arithmetic number, because the mean of its divisors is an integer number (1533600).

Almost surely, 2^56665224 is an apocalyptic number.

56665224 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56665224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98150400).

56665224 is an abundant number, since it is smaller than the sum of its proper divisors (139635576).

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

56665224 is a wasteful number, since it uses less digits than its factorization.

56665224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3440 (or 3430 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 56665224 is about 7527.6307029503. The cubic root of 56665224 is about 384.0951912445.

The spelling of 56665224 in words is "fifty-six million, six hundred sixty-five thousand, two hundred twenty-four".