56557225 has 12 divisors (see below), whose sum is σ = 70265344. Its totient is φ = 45159120.

The previous prime is 56557217. The next prime is 56557229. The reversal of 56557225 is 52275565.

It is a happy number.

It is not a de Polignac number, because 56557225 - 2³ = 56557217 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56557229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13312 + ... + 17038.

Almost surely, 2^56557225 is an apocalyptic number.

It is an amenable number.

56557225 is a deficient number, since it is larger than the sum of its proper divisors (13708119).

56557225 is a wasteful number, since it uses less digits than its factorization.

56557225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4344 (or 4339 counting only the distinct ones).

The product of its digits is 105000, while the sum is 37.

The square root of 56557225 is about 7520.4537762026. The cubic root of 56557225 is about 383.8510186862.

It can be divided in two parts, 5655 and 7225, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 56557225 in words is "fifty-six million, five hundred fifty-seven thousand, two hundred twenty-five".