56572221 has 8 divisors (see below), whose sum is σ = 76176864. Its totient is φ = 37341200.

The previous prime is 56572213. The next prime is 56572231. The reversal of 56572221 is 12227565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56572221 - 2³ = 56572213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56572231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93051 + ... + 93656.

It is an arithmetic number, because the mean of its divisors is an integer number (9522108).

Almost surely, 2^56572221 is an apocalyptic number.

It is an amenable number.

56572221 is a deficient number, since it is larger than the sum of its proper divisors (19604643).

56572221 is a wasteful number, since it uses less digits than its factorization.

56572221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186811.

The product of its digits is 8400, while the sum is 30.

The square root of 56572221 is about 7521.4507244281. The cubic root of 56572221 is about 383.8849413854.

Adding to 56572221 its reverse (12227565), we get a palindrome (68799786).

The spelling of 56572221 in words is "fifty-six million, five hundred seventy-two thousand, two hundred twenty-one".