117215205 has 16 divisors (see below), whose sum is σ = 191906880. Its totient is φ = 61060608.

The previous prime is 117215177. The next prime is 117215233. The reversal of 117215205 is 502512711.

It is an interprime number because it is at equal distance from previous prime (117215177) and next prime (117215233).

It is not a de Polignac number, because 117215205 - 2⁶ = 117215141 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90220 + ... + 91509.

It is an arithmetic number, because the mean of its divisors is an integer number (11994180).

Almost surely, 2^117215205 is an apocalyptic number.

117215205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117215205 is a deficient number, since it is larger than the sum of its proper divisors (74691675).

117215205 is a wasteful number, since it uses less digits than its factorization.

117215205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181780.

The product of its (nonzero) digits is 700, while the sum is 24.

The square root of 117215205 is about 10826.5971108193. The cubic root of 117215205 is about 489.3970161636.

Adding to 117215205 its reverse (502512711), we get a palindrome (619727916).

The spelling of 117215205 in words is "one hundred seventeen million, two hundred fifteen thousand, two hundred five".