56221560 has 64 divisors (see below), whose sum is σ = 187408800. Its totient is φ = 14992128.

The previous prime is 56221553. The next prime is 56221579. The reversal of 56221560 is 6512265.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24949 + ... + 27108.

Almost surely, 2^56221560 is an apocalyptic number.

It is an amenable number.

56221560 is an abundant number, since it is smaller than the sum of its proper divisors (131187240).

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

56221560 is a wasteful number, since it uses less digits than its factorization.

56221560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52077 (or 52067 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 56221560 is about 7498.1037602850. The cubic root of 56221560 is about 383.0901309693.

It can be divided in two parts, 562 and 21560, that added together give a palindrome (22122).

The spelling of 56221560 in words is "fifty-six million, two hundred twenty-one thousand, five hundred sixty".