56646225 has 18 divisors (see below), whose sum is σ = 101460086. Its totient is φ = 30211200.

The previous prime is 56646221. The next prime is 56646229. The reversal of 56646225 is 52264665.

56646225 is a `hidden beast` number, since 5 + 6 + 646 + 2 + 2 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (56646221) and next prime (56646229).

It can be written as a sum of positive squares in 3 ways, for example, as 576081 + 56070144 = 759^2 + 7488^2 .

It is not a de Polignac number, because 56646225 - 2² = 56646221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56646225.

It is not an unprimeable number, because it can be changed into a prime (56646221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 125656 + ... + 126105.

Almost surely, 2^56646225 is an apocalyptic number.

It is an amenable number.

56646225 is a deficient number, since it is larger than the sum of its proper divisors (44813861).

56646225 is a wasteful number, since it uses less digits than its factorization.

56646225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251777 (or 251769 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 56646225 is about 7526.3686462995. The cubic root of 56646225 is about 384.0522593264.

The spelling of 56646225 in words is "fifty-six million, six hundred forty-six thousand, two hundred twenty-five".