220555872 has 60 divisors (see below), whose sum is σ = 648656316. Its totient is φ = 73517760.

The previous prime is 220555859. The next prime is 220555873. The reversal of 220555872 is 278555022.

220555872 is a `hidden beast` number, since 2 + 20 + 55 + 587 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220555873) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 39954 + ... + 45137.

Almost surely, 2^220555872 is an apocalyptic number.

It is an amenable number.

220555872 is an abundant number, since it is smaller than the sum of its proper divisors (428100444).

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

220555872 is an equidigital number, since it uses as much as digits as its factorization.

220555872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85113 (or 85096 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 220555872 is about 14851.1235938565. The cubic root of 220555872 is about 604.1890845512.

The spelling of 220555872 in words is "two hundred twenty million, five hundred fifty-five thousand, eight hundred seventy-two".