216508314 has 32 divisors (see below), whose sum is σ = 473770944. Its totient is φ = 65415680.

The previous prime is 216508307. The next prime is 216508381. The reversal of 216508314 is 413805612.

It is a super-2 number, since 2×216508314² = 93751700062245192, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18652 + ... + 27944.

It is an arithmetic number, because the mean of its divisors is an integer number (14805342).

Almost surely, 2^216508314 is an apocalyptic number.

216508314 is an abundant number, since it is smaller than the sum of its proper divisors (257262630).

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

216508314 is a wasteful number, since it uses less digits than its factorization.

216508314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9662.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 216508314 is about 14714.2214880706. The cubic root of 216508314 is about 600.4702923899.

The spelling of 216508314 in words is "two hundred sixteen million, five hundred eight thousand, three hundred fourteen".