221832140 has 24 divisors (see below), whose sum is σ = 477211392. Its totient is φ = 86568320.

The previous prime is 221832101. The next prime is 221832157. The reversal of 221832140 is 41238122.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134444 + ... + 136083.

It is an arithmetic number, because the mean of its divisors is an integer number (19883808).

Almost surely, 2^221832140 is an apocalyptic number.

221832140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221832140 is an abundant number, since it is smaller than the sum of its proper divisors (255379252).

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

221832140 is a wasteful number, since it uses less digits than its factorization.

221832140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270577 (or 270575 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 221832140 is about 14894.0303477601. The cubic root of 221832140 is about 605.3522434800.

The spelling of 221832140 in words is "two hundred twenty-one million, eight hundred thirty-two thousand, one hundred forty".