56022921 has 56 divisors (see below), whose sum is σ = 90377984. Its totient is φ = 34642080.

The previous prime is 56022907. The next prime is 56022959. The reversal of 56022921 is 12922065.

It is not a de Polignac number, because 56022921 - 2⁹ = 56022409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56022971) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 836130 + ... + 836196.

Almost surely, 2^56022921 is an apocalyptic number.

It is an amenable number.

56022921 is a deficient number, since it is larger than the sum of its proper divisors (34355063).

56022921 is an equidigital number, since it uses as much as digits as its factorization.

56022921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 56022921 is about 7484.8460906020. The cubic root of 56022921 is about 382.6384274055.

Adding to 56022921 its reverse (12922065), we get a palindrome (68944986).

The spelling of 56022921 in words is "fifty-six million, twenty-two thousand, nine hundred twenty-one".