220815912 has 16 divisors (see below), whose sum is σ = 552039840. Its totient is φ = 73605296.

The previous prime is 220815901. The next prime is 220815943. The reversal of 220815912 is 219518022.

It is a self number, because there is not a number n which added to its sum of digits gives 220815912.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4600308 + ... + 4600355.

It is an arithmetic number, because the mean of its divisors is an integer number (34502490).

Almost surely, 2^220815912 is an apocalyptic number.

It is an amenable number.

220815912 is an abundant number, since it is smaller than the sum of its proper divisors (331223928).

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

220815912 is a wasteful number, since it uses less digits than its factorization.

220815912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9200672 (or 9200668 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 220815912 is about 14859.8759079610. The cubic root of 220815912 is about 604.4264418277.

The spelling of 220815912 in words is "two hundred twenty million, eight hundred fifteen thousand, nine hundred twelve".