216122885 has 16 divisors (see below), whose sum is σ = 285161472. Its totient is φ = 155937600.

The previous prime is 216122867. The next prime is 216122909. The reversal of 216122885 is 588221612.

It is a happy number.

It is not a de Polignac number, because 216122885 - 2⁸ = 216122629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8486 + ... + 22455.

It is an arithmetic number, because the mean of its divisors is an integer number (17822592).

Almost surely, 2^216122885 is an apocalyptic number.

It is an amenable number.

216122885 is a deficient number, since it is larger than the sum of its proper divisors (69038587).

216122885 is a wasteful number, since it uses less digits than its factorization.

216122885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31084.

The product of its digits is 15360, while the sum is 35.

The square root of 216122885 is about 14701.1184948629. The cubic root of 216122885 is about 600.1137608368.

The spelling of 216122885 in words is "two hundred sixteen million, one hundred twenty-two thousand, eight hundred eighty-five".