216943914 has 16 divisors (see below), whose sum is σ = 473332320. Its totient is φ = 65740560.

The previous prime is 216943897. The next prime is 216943943. The reversal of 216943914 is 419349612.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1643449 + ... + 1643580.

It is an arithmetic number, because the mean of its divisors is an integer number (29583270).

Almost surely, 2^216943914 is an apocalyptic number.

216943914 is an abundant number, since it is smaller than the sum of its proper divisors (256388406).

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

216943914 is a wasteful number, since it uses less digits than its factorization.

216943914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3287045.

The product of its digits is 46656, while the sum is 39.

The square root of 216943914 is about 14729.0160567500. The cubic root of 216943914 is about 600.8727244158.

The spelling of 216943914 in words is "two hundred sixteen million, nine hundred forty-three thousand, nine hundred fourteen".