221832860 has 12 divisors (see below), whose sum is σ = 465849048. Its totient is φ = 88733136.

The previous prime is 221832859. The next prime is 221832901. The reversal of 221832860 is 68238122.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent 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, 5545802 + ... + 5545841.

It is an arithmetic number, because the mean of its divisors is an integer number (38820754).

Almost surely, 2^221832860 is an apocalyptic number.

221832860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221832860 is an abundant number, since it is smaller than the sum of its proper divisors (244016188).

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

221832860 is a wasteful number, since it uses less digits than its factorization.

221832860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11091652 (or 11091650 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 221832860 is about 14894.0545184983. The cubic root of 221832860 is about 605.3528984094.

The spelling of 221832860 in words is "two hundred twenty-one million, eight hundred thirty-two thousand, eight hundred sixty".