216988895 has 16 divisors (see below), whose sum is σ = 270304128. Its totient is φ = 167101440.

The previous prime is 216988861. The next prime is 216988907. The reversal of 216988895 is 598889612.

It is not a de Polignac number, because 216988895 - 2¹⁶ = 216923359 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216988895.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6767 + ... + 21903.

It is an arithmetic number, because the mean of its divisors is an integer number (16894008).

Almost surely, 2^216988895 is an apocalyptic number.

216988895 is a deficient number, since it is larger than the sum of its proper divisors (53315233).

216988895 is a wasteful number, since it uses less digits than its factorization.

216988895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15250.

The product of its digits is 2488320, while the sum is 56.

The square root of 216988895 is about 14730.5429295732. The cubic root of 216988895 is about 600.9142497234.

The spelling of 216988895 in words is "two hundred sixteen million, nine hundred eighty-eight thousand, eight hundred ninety-five".