220451812 has 12 divisors (see below), whose sum is σ = 440903680. Its totient is φ = 94479336.

The previous prime is 220451797. The next prime is 220451821. The reversal of 220451812 is 218154022.

220451812 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3936612 + ... + 3936667.

Almost surely, 2^220451812 is an apocalyptic number.

It is an amenable number.

220451812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

220451812 is a wasteful number, since it uses less digits than its factorization.

220451812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7873290 (or 7873288 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 220451812 is about 14847.6197418980. The cubic root of 220451812 is about 604.0940492116.

The spelling of 220451812 in words is "two hundred twenty million, four hundred fifty-one thousand, eight hundred twelve".