216692955 has 32 divisors (see below), whose sum is σ = 386718720. Its totient is φ = 115123680.

The previous prime is 216692947. The next prime is 216692977. The reversal of 216692955 is 559296612.

It is a happy number.

It is not a de Polignac number, because 216692955 - 2³ = 216692947 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 216692955.

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 31 ways as a sum of consecutive naturals, for example, 33624 + ... + 39546.

It is an arithmetic number, because the mean of its divisors is an integer number (12084960).

Almost surely, 2^216692955 is an apocalyptic number.

216692955 is a deficient number, since it is larger than the sum of its proper divisors (170025765).

216692955 is a wasteful number, since it uses less digits than its factorization.

216692955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6208 (or 6202 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 216692955 is about 14720.4943870782. The cubic root of 216692955 is about 600.6409400826.

The spelling of 216692955 in words is "two hundred sixteen million, six hundred ninety-two thousand, nine hundred fifty-five".