216317930 has 16 divisors (see below), whose sum is σ = 390030984. Its totient is φ = 86380800.

The previous prime is 216317917. The next prime is 216317951. The reversal of 216317930 is 39713612.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 215707969 + 609961 = 14687^2 + 781^2 .

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, 11987 + ... + 24006.

Almost surely, 2^216317930 is an apocalyptic number.

216317930 is a deficient number, since it is larger than the sum of its proper divisors (173713054).

216317930 is a wasteful number, since it uses less digits than its factorization.

216317930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36601.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 216317930 is about 14707.7506777889. The cubic root of 216317930 is about 600.2942353153.

The spelling of 216317930 in words is "two hundred sixteen million, three hundred seventeen thousand, nine hundred thirty".