56221724 has 24 divisors (see below), whose sum is σ = 109377408. Its totient is φ = 25110720.

The previous prime is 56221721. The next prime is 56221727. The reversal of 56221724 is 42712265.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (56221721) and next prime (56221727).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56221721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15827 + ... + 19050.

It is an arithmetic number, because the mean of its divisors is an integer number (4557392).

Almost surely, 2^56221724 is an apocalyptic number.

It is an amenable number.

56221724 is a deficient number, since it is larger than the sum of its proper divisors (53155684).

56221724 is a wasteful number, since it uses less digits than its factorization.

56221724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34925 (or 34923 counting only the distinct ones).

The product of its digits is 6720, while the sum is 29.

The square root of 56221724 is about 7498.1146963753. The cubic root of 56221724 is about 383.0905034641.

Adding to 56221724 its reverse (42712265), we get a palindrome (98933989).

The spelling of 56221724 in words is "fifty-six million, two hundred twenty-one thousand, seven hundred twenty-four".