220181800 has 24 divisors (see below), whose sum is σ = 511923150. Its totient is φ = 88072640.

The previous prime is 220181791. The next prime is 220181803. The reversal of 220181800 is 8181022.

It can be written as a sum of positive squares in 3 ways, for example, as 112063396 + 108118404 = 10586^2 + 10398^2 .

It is not an unprimeable number, because it can be changed into a prime (220181803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 550255 + ... + 550654.

Almost surely, 2^220181800 is an apocalyptic number.

220181800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220181800 is an abundant number, since it is smaller than the sum of its proper divisors (291741350).

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

220181800 is a wasteful number, since it uses less digits than its factorization.

220181800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100925 (or 1100916 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 220181800 is about 14838.5241853764. The cubic root of 220181800 is about 603.8473145921.

The spelling of 220181800 in words is "two hundred twenty million, one hundred eighty-one thousand, eight hundred".