56221872 has 80 divisors (see below), whose sum is σ = 167251200. Its totient is φ = 15941376.

The previous prime is 56221849. The next prime is 56221877. The reversal of 56221872 is 27812265.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (56221877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49503 + ... + 50625.

It is an arithmetic number, because the mean of its divisors is an integer number (2090640).

Almost surely, 2^56221872 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 56221872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83625600).

56221872 is an abundant number, since it is smaller than the sum of its proper divisors (111029328).

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

56221872 is a wasteful number, since it uses less digits than its factorization.

56221872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290 (or 1284 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 56221872 is about 7498.1245655164. The cubic root of 56221872 is about 383.0908396174.

The spelling of 56221872 in words is "fifty-six million, two hundred twenty-one thousand, eight hundred seventy-two".