56552220 has 72 divisors (see below), whose sum is σ = 172470480. Its totient is φ = 14999040.

The previous prime is 56552203. The next prime is 56552231. The reversal of 56552220 is 2225565.

56552220 is a `hidden beast` number, since 5 + 655 + 2 + 2 + 2 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37236 + ... + 38724.

Almost surely, 2^56552220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56552220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86235240).

56552220 is an abundant number, since it is smaller than the sum of its proper divisors (115918260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56552220 is a wasteful number, since it uses less digits than its factorization.

56552220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715 (or 1710 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 56552220 is about 7520.1210096647. The cubic root of 56552220 is about 383.8396954584.

Adding to 56552220 its reverse (2225565), we get a palindrome (58777785).

It can be divided in two parts, 5655 and 2220, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 56552220 in words is "fifty-six million, five hundred fifty-two thousand, two hundred twenty".