220202100 has 54 divisors (see below), whose sum is σ = 690214070. Its totient is φ = 58720320.

The previous prime is 220202093. The next prime is 220202111. The reversal of 220202100 is 1202022.

It can be written as a sum of positive squares in 3 ways, for example, as 27436644 + 192765456 = 5238^2 + 13884^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 121435 + ... + 123234.

Almost surely, 2^220202100 is an apocalyptic number.

220202100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220202100 is an abundant number, since it is smaller than the sum of its proper divisors (470011970).

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

220202100 is a wasteful number, since it uses less digits than its factorization.

220202100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244689 (or 244679 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 220202100 is about 14839.2081999007. The cubic root of 220202100 is about 603.8658715661.

Adding to 220202100 its reverse (1202022), we get a palindrome (221404122).

The spelling of 220202100 in words is "two hundred twenty million, two hundred two thousand, one hundred".