56522165220 has 144 divisors (see below), whose sum is σ = 181137116160. Its totient is φ = 14243136768.

The previous prime is 56522165209. The next prime is 56522165221. The reversal of 56522165220 is 2256122565.

56522165220 is a `hidden beast` number, since 56 + 522 + 1 + 65 + 2 + 20 = 666.

It is a super-2 number, since 2×56522165220² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (56522165221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 130149 + ... + 360531.

It is an arithmetic number, because the mean of its divisors is an integer number (1257896640).

Almost surely, 2^56522165220 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 56522165220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90568558080).

56522165220 is an abundant number, since it is smaller than the sum of its proper divisors (124614950940).

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

56522165220 is a wasteful number, since it uses less digits than its factorization.

56522165220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230474 (or 230469 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 56522165220 its reverse (2256122565), we get a palindrome (58778287785).

The spelling of 56522165220 in words is "fifty-six billion, five hundred twenty-two million, one hundred sixty-five thousand, two hundred twenty".