216922925 has 12 divisors (see below), whose sum is σ = 269420256. Its totient is φ = 173257200.

The previous prime is 216922921. The next prime is 216922933. The reversal of 216922925 is 529229612.

It is not a de Polignac number, because 216922925 - 2² = 216922921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216922921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9470 + ... + 22880.

It is an arithmetic number, because the mean of its divisors is an integer number (22451688).

Almost surely, 2^216922925 is an apocalyptic number.

216922925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216922925 is a deficient number, since it is larger than the sum of its proper divisors (52497331).

216922925 is a wasteful number, since it uses less digits than its factorization.

216922925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14068 (or 14063 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 216922925 is about 14728.3035343518. The cubic root of 216922925 is about 600.8533459443.

The spelling of 216922925 in words is "two hundred sixteen million, nine hundred twenty-two thousand, nine hundred twenty-five".