56221904 has 20 divisors (see below), whose sum is σ = 109055520. Its totient is φ = 28078560.

The previous prime is 56221903. The next prime is 56221933. The reversal of 56221904 is 40912265.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56221903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18749 + ... + 21539.

It is an arithmetic number, because the mean of its divisors is an integer number (5452776).

Almost surely, 2^56221904 is an apocalyptic number.

It is an amenable number.

56221904 is a deficient number, since it is larger than the sum of its proper divisors (52833616).

56221904 is a wasteful number, since it uses less digits than its factorization.

56221904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4058 (or 4052 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 56221904 is about 7498.1266993830. The cubic root of 56221904 is about 383.0909122991.

The spelling of 56221904 in words is "fifty-six million, two hundred twenty-one thousand, nine hundred four".