216994086 has 32 divisors (see below), whose sum is σ = 510576480. Its totient is φ = 68076288.

The previous prime is 216994081. The next prime is 216994087. The reversal of 216994086 is 680499612.

It is a happy number.

216994086 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216994081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117271 + ... + 119106.

It is an arithmetic number, because the mean of its divisors is an integer number (15955515).

Almost surely, 2^216994086 is an apocalyptic number.

216994086 is an abundant number, since it is smaller than the sum of its proper divisors (293582394).

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

216994086 is a wasteful number, since it uses less digits than its factorization.

216994086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236405 (or 236399 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 216994086 is about 14730.7191270488. The cubic root of 216994086 is about 600.9190415523.

The spelling of 216994086 in words is "two hundred sixteen million, nine hundred ninety-four thousand, eighty-six".