56575221 has 8 divisors (see below), whose sum is σ = 76857120. Its totient is φ = 37005072.

The previous prime is 56575213. The next prime is 56575231. The reversal of 56575221 is 12257565.

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

It is not a de Polignac number, because 56575221 - 2³ = 56575213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56575231) 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, 177751 + ... + 178068.

It is an arithmetic number, because the mean of its divisors is an integer number (9607140).

Almost surely, 2^56575221 is an apocalyptic number.

It is an amenable number.

56575221 is a deficient number, since it is larger than the sum of its proper divisors (20281899).

56575221 is a wasteful number, since it uses less digits than its factorization.

56575221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355875.

The product of its digits is 21000, while the sum is 33.

The square root of 56575221 is about 7521.6501513963. The cubic root of 56575221 is about 383.8917270154.

It can be divided in two parts, 5657 and 5221, that added together give a triangular number (10878 = T₁₄₇).

The spelling of 56575221 in words is "fifty-six million, five hundred seventy-five thousand, two hundred twenty-one".