117215685 has 24 divisors (see below), whose sum is σ = 203540064. Its totient is φ = 62402400.

The previous prime is 117215653. The next prime is 117215687. The reversal of 117215685 is 586512711.

It is not a de Polignac number, because 117215685 - 2⁵ = 117215653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117215687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26910 + ... + 30960.

It is an arithmetic number, because the mean of its divisors is an integer number (8480836).

Almost surely, 2^117215685 is an apocalyptic number.

117215685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117215685 is a deficient number, since it is larger than the sum of its proper divisors (86324379).

117215685 is a wasteful number, since it uses less digits than its factorization.

117215685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4705 (or 4702 counting only the distinct ones).

The product of its digits is 16800, while the sum is 36.

The square root of 117215685 is about 10826.6192784267. The cubic root of 117215685 is about 489.3976841948.

The spelling of 117215685 in words is "one hundred seventeen million, two hundred fifteen thousand, six hundred eighty-five".