216913072 has 20 divisors (see below), whose sum is σ = 427160656. Its totient is φ = 106678080.

The previous prime is 216913061. The next prime is 216913097. The reversal of 216913072 is 270319612.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110148 + ... + 112099.

Almost surely, 2^216913072 is an apocalyptic number.

It is an amenable number.

216913072 is a deficient number, since it is larger than the sum of its proper divisors (210247584).

216913072 is a wasteful number, since it uses less digits than its factorization.

216913072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222316 (or 222310 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 216913072 is about 14727.9690385335. The cubic root of 216913072 is about 600.8442485538.

The spelling of 216913072 in words is "two hundred sixteen million, nine hundred thirteen thousand, seventy-two".