117215775 has 48 divisors (see below), whose sum is σ = 216613120. Its totient is φ = 62143200.

The previous prime is 117215773. The next prime is 117215783. The reversal of 117215775 is 577512711.

117215775 is a `hidden beast` number, since 11 + 72 + 1 + 577 + 5 = 666.

It is not a de Polignac number, because 117215775 - 2¹ = 117215773 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117215771) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 142014 + ... + 142836.

Almost surely, 2^117215775 is an apocalyptic number.

117215775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

117215775 is a deficient number, since it is larger than the sum of its proper divisors (99397345).

117215775 is a wasteful number, since it uses less digits than its factorization.

117215775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053 (or 1042 counting only the distinct ones).

The product of its digits is 17150, while the sum is 36.

The square root of 117215775 is about 10826.6234348480. The cubic root of 117215775 is about 489.3978094505.

The spelling of 117215775 in words is "one hundred seventeen million, two hundred fifteen thousand, seven hundred seventy-five".