216331957396215 has 24 divisors (see below), whose sum is σ = 387905578781760. Its totient is φ = 111398525187264.

The previous prime is 216331957396207. The next prime is 216331957396271. The reversal of 216331957396215 is 512693759133612.

216331957396215 is a `hidden beast` number, since 2 + 1 + 6 + 3 + 31 + 9 + 573 + 9 + 6 + 21 + 5 = 666.

It is not a de Polignac number, because 216331957396215 - 2³ = 216331957396207 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82885806127 + ... + 82885808736.

It is an arithmetic number, because the mean of its divisors is an integer number (16162732449240).

Almost surely, 2^{216331957396215} is an apocalyptic number.

216331957396215 is a deficient number, since it is larger than the sum of its proper divisors (171573621385545).

216331957396215 is a wasteful number, since it uses less digits than its factorization.

216331957396215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165771614903 (or 165771614900 counting only the distinct ones).

The product of its digits is 55112400, while the sum is 63.

The spelling of 216331957396215 in words is "two hundred sixteen trillion, three hundred thirty-one billion, nine hundred fifty-seven million, three hundred ninety-six thousand, two hundred fifteen".