220551500 has 48 divisors (see below), whose sum is σ = 518752416. Its totient is φ = 81432000.

The previous prime is 220551493. The next prime is 220551599. The reversal of 220551500 is 5155022.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 10466 + ... + 23465.

It is an arithmetic number, because the mean of its divisors is an integer number (10807342).

Almost surely, 2^220551500 is an apocalyptic number.

220551500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220551500 is an abundant number, since it is smaller than the sum of its proper divisors (298200916).

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

220551500 is a wasteful number, since it uses less digits than its factorization.

220551500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33963 (or 33951 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 220551500 is about 14850.9763988769. The cubic root of 220551500 is about 604.1850923169.

The spelling of 220551500 in words is "two hundred twenty million, five hundred fifty-one thousand, five hundred".