216733923 has 24 divisors (see below), whose sum is σ = 359410688. Its totient is φ = 123284592.

The previous prime is 216733903. The next prime is 216733973. The reversal of 216733923 is 329337612.

It is not a de Polignac number, because 216733923 - 2⁶ = 216733859 is a prime.

It is a hoax number, since the sum of its digits (36) 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 (216733903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6336 + ... + 21762.

Almost surely, 2^216733923 is an apocalyptic number.

216733923 is a deficient number, since it is larger than the sum of its proper divisors (142676765).

216733923 is a wasteful number, since it uses less digits than its factorization.

216733923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15663 (or 15660 counting only the distinct ones).

The product of its digits is 40824, while the sum is 36.

The square root of 216733923 is about 14721.8858506646. The cubic root of 216733923 is about 600.6787901170.

The spelling of 216733923 in words is "two hundred sixteen million, seven hundred thirty-three thousand, nine hundred twenty-three".