56606220 has 216 divisors, whose sum is σ = 198682848. Its totient is φ = 13009920.

The previous prime is 56606219. The next prime is 56606233. The reversal of 56606220 is 2260665.

56606220 is a `hidden beast` number, since 56 + 606 + 2 + 2 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 500884 + ... + 500996.

It is an arithmetic number, because the mean of its divisors is an integer number (919828).

Almost surely, 2^56606220 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 56606220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99341424).

56606220 is an abundant number, since it is smaller than the sum of its proper divisors (142076628).

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

56606220 is a wasteful number, since it uses less digits than its factorization.

56606220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 56606220 is about 7523.7105207471. The cubic root of 56606220 is about 383.9618288881.

Adding to 56606220 its reverse (2260665), we get a palindrome (58866885).

The spelling of 56606220 in words is "fifty-six million, six hundred six thousand, two hundred twenty".