216998516 has 12 divisors (see below), whose sum is σ = 433997088. Its totient is φ = 92999352.

The previous prime is 216998513. The next prime is 216998521. The reversal of 216998516 is 615899612.

It is a happy number.

216998516 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216998513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3874946 + ... + 3875001.

It is an arithmetic number, because the mean of its divisors is an integer number (36166424).

Almost surely, 2^216998516 is an apocalyptic number.

It is an amenable number.

216998516 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216998516 is a wasteful number, since it uses less digits than its factorization.

216998516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7749958 (or 7749956 counting only the distinct ones).

The product of its digits is 233280, while the sum is 47.

The square root of 216998516 is about 14730.8694923280. The cubic root of 216998516 is about 600.9231308392.

The spelling of 216998516 in words is "two hundred sixteen million, nine hundred ninety-eight thousand, five hundred sixteen".