216358955 has 16 divisors (see below), whose sum is σ = 261940800. Its totient is φ = 171555840.

The previous prime is 216358931. The next prime is 216358981. The reversal of 216358955 is 559853612.

It is not a de Polignac number, because 216358955 - 2⁸ = 216358699 is a prime.

It is a super-3 number, since 3×216358955³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 492626 + ... + 493064.

It is an arithmetic number, because the mean of its divisors is an integer number (16371300).

Almost surely, 2^216358955 is an apocalyptic number.

216358955 is a deficient number, since it is larger than the sum of its proper divisors (45581845).

216358955 is a wasteful number, since it uses less digits than its factorization.

216358955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094.

The product of its digits is 324000, while the sum is 44.

The square root of 216358955 is about 14709.1452844820. The cubic root of 216358955 is about 600.3321817989.

The spelling of 216358955 in words is "two hundred sixteen million, three hundred fifty-eight thousand, nine hundred fifty-five".