117651231 has 64 divisors (see below), whose sum is σ = 192614400. Its totient is φ = 70761600.

The previous prime is 117651227. The next prime is 117651239. The reversal of 117651231 is 132156711.

117651231 is a `hidden beast` number, since 1 + 1 + 7 + 651 + 2 + 3 + 1 = 666.

It is not a de Polignac number, because 117651231 - 2² = 117651227 is a prime.

It is a super-2 number, since 2×117651231² = 27683624311630722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 117651195 and 117651204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117651239) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 898036 + ... + 898166.

It is an arithmetic number, because the mean of its divisors is an integer number (3009600).

Almost surely, 2^117651231 is an apocalyptic number.

117651231 is a deficient number, since it is larger than the sum of its proper divisors (74963169).

117651231 is a wasteful number, since it uses less digits than its factorization.

117651231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 231 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 117651231 is about 10846.7152170600. The cubic root of 117651231 is about 490.0030973010.

It can be divided in two parts, 11765 and 1231, that added together give a square (12996 = 114²).

The spelling of 117651231 in words is "one hundred seventeen million, six hundred fifty-one thousand, two hundred thirty-one".