216892225 has 24 divisors (see below), whose sum is σ = 294311520. Its totient is φ = 157248000.

The previous prime is 216892217. The next prime is 216892243. The reversal of 216892225 is 522298612.

It is not a de Polignac number, because 216892225 - 2³ = 216892217 is a prime.

It is a hoax number, since the sum of its digits (37) 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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103185 + ... + 105265.

It is an arithmetic number, because the mean of its divisors is an integer number (12262980).

Almost surely, 2^216892225 is an apocalyptic number.

216892225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216892225 is a deficient number, since it is larger than the sum of its proper divisors (77419295).

216892225 is a wasteful number, since it uses less digits than its factorization.

216892225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481 (or 2476 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 216892225 is about 14727.2612864714. The cubic root of 216892225 is about 600.8249993661.

The spelling of 216892225 in words is "two hundred sixteen million, eight hundred ninety-two thousand, two hundred twenty-five".