216600972 has 36 divisors (see below), whose sum is σ = 587918520. Its totient is φ = 61885824.

The previous prime is 216600947. The next prime is 216601031. The reversal of 216600972 is 279006612.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183597 + ... + 184772.

It is an arithmetic number, because the mean of its divisors is an integer number (16331070).

Almost surely, 2^216600972 is an apocalyptic number.

It is an amenable number.

216600972 is an abundant number, since it is smaller than the sum of its proper divisors (371317548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216600972 is a wasteful number, since it uses less digits than its factorization.

216600972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368390 (or 368381 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 216600972 is about 14717.3697378302. The cubic root of 216600972 is about 600.5559402805. Note that the first 3 decimals are identical.

The spelling of 216600972 in words is "two hundred sixteen million, six hundred thousand, nine hundred seventy-two".