216333117 has 144 divisors (see below), whose sum is σ = 441517440. Its totient is φ = 99221760.

The previous prime is 216333083. The next prime is 216333133. The reversal of 216333117 is 711333612.

216333117 is a `hidden beast` number, since 21 + 633 + 3 + 1 + 1 + 7 = 666.

It is not a de Polignac number, because 216333117 - 2⁶ = 216333053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216333167) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3666634 + ... + 3666692.

Almost surely, 2^216333117 is an apocalyptic number.

It is an amenable number.

216333117 is an abundant number, since it is smaller than the sum of its proper divisors (225184323).

216333117 is a wasteful number, since it uses less digits than its factorization.

216333117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 130 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 216333117 is about 14708.2669611345. The cubic root of 216333117 is about 600.3082832419.

Adding to 216333117 its reverse (711333612), we get a palindrome (927666729).

It can be divided in two parts, 216333 and 117, that multiplied together give a square (25310961 = 5031²).

The spelling of 216333117 in words is "two hundred sixteen million, three hundred thirty-three thousand, one hundred seventeen".