221162100 has 36 divisors (see below), whose sum is σ = 639896544. Its totient is φ = 58976480.

The previous prime is 221162087. The next prime is 221162141. The reversal of 221162100 is 1261122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221162100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 368304 + ... + 368903.

It is an arithmetic number, because the mean of its divisors is an integer number (17774904).

Almost surely, 2^221162100 is an apocalyptic number.

221162100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221162100 is an abundant number, since it is smaller than the sum of its proper divisors (418734444).

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

221162100 is a wasteful number, since it uses less digits than its factorization.

221162100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737224 (or 737217 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 221162100 is about 14871.5197609390. The cubic root of 221162100 is about 604.7421436040.

The spelling of 221162100 in words is "two hundred twenty-one million, one hundred sixty-two thousand, one hundred".