117288831 has 16 divisors (see below), whose sum is σ = 180638208. Its totient is φ = 66902400.

The previous prime is 117288827. The next prime is 117288833. The reversal of 117288831 is 138882711.

117288831 = 363² + 364² + ... + 736².

It is not a de Polignac number, because 117288831 - 2² = 117288827 is a prime.

It is a super-2 number, since 2×117288831² = 27513339754693122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 117288831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117288833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103975 + ... + 105096.

It is an arithmetic number, because the mean of its divisors is an integer number (11289888).

Almost surely, 2^117288831 is an apocalyptic number.

117288831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

117288831 is a deficient number, since it is larger than the sum of its proper divisors (63349377).

117288831 is a wasteful number, since it uses less digits than its factorization.

117288831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209102.

The product of its digits is 21504, while the sum is 39.

The square root of 117288831 is about 10829.9968144040. The cubic root of 117288831 is about 489.4994624946.

The spelling of 117288831 in words is "one hundred seventeen million, two hundred eighty-eight thousand, eight hundred thirty-one".