220722180 has 48 divisors (see below), whose sum is σ = 706312320. Its totient is φ = 50450688.

The previous prime is 220722179. The next prime is 220722211. The reversal of 220722180 is 81227022.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 220722180.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262345 + ... + 263184.

It is an arithmetic number, because the mean of its divisors is an integer number (14714840).

Almost surely, 2^220722180 is an apocalyptic number.

220722180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220722180 is an abundant number, since it is smaller than the sum of its proper divisors (485590140).

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

220722180 is a wasteful number, since it uses less digits than its factorization.

220722180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525548 (or 525546 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 220722180 is about 14856.7217110640. The cubic root of 220722180 is about 604.3409073557.

The spelling of 220722180 in words is "two hundred twenty million, seven hundred twenty-two thousand, one hundred eighty".