221332923 has 12 divisors (see below), whose sum is σ = 365375088. Its totient is φ = 126475920.

The previous prime is 221332921. The next prime is 221332939. The reversal of 221332923 is 329233122.

It is not a de Polignac number, because 221332923 - 2¹ = 221332921 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (221332921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1756548 + ... + 1756673.

It is an arithmetic number, because the mean of its divisors is an integer number (30447924).

Almost surely, 2^221332923 is an apocalyptic number.

221332923 is a deficient number, since it is larger than the sum of its proper divisors (144042165).

221332923 is a wasteful number, since it uses less digits than its factorization.

221332923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3513234 (or 3513231 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 221332923 is about 14877.2619456673. The cubic root of 221332923 is about 604.8978021032.

The spelling of 221332923 in words is "two hundred twenty-one million, three hundred thirty-two thousand, nine hundred twenty-three".