216359925 has 12 divisors (see below), whose sum is σ = 357715200. Its totient is φ = 115391920.

The previous prime is 216359921. The next prime is 216359929. The reversal of 216359925 is 529953612.

It is an interprime number because it is at equal distance from previous prime (216359921) and next prime (216359929).

It is not a de Polignac number, because 216359925 - 2² = 216359921 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216359921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1442325 + ... + 1442474.

It is an arithmetic number, because the mean of its divisors is an integer number (29809600).

Almost surely, 2^216359925 is an apocalyptic number.

216359925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216359925 is a deficient number, since it is larger than the sum of its proper divisors (141355275).

216359925 is a wasteful number, since it uses less digits than its factorization.

216359925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2884812 (or 2884807 counting only the distinct ones).

The product of its digits is 145800, while the sum is 42.

The square root of 216359925 is about 14709.1782571291. The cubic root of 216359925 is about 600.3330789520. Note that the first 3 decimals are identical.

The spelling of 216359925 in words is "two hundred sixteen million, three hundred fifty-nine thousand, nine hundred twenty-five".