117431231 has 16 divisors (see below), whose sum is σ = 122330880. Its totient is φ = 112674240.

The previous prime is 117431219. The next prime is 117431233. The reversal of 117431231 is 132134711.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 117431231 - 2¹⁰ = 117430207 is a prime.

It is a super-2 number, since 2×117431231² = 27580188028350722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 117431197 and 117431206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117431233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 720356 + ... + 720518.

It is an arithmetic number, because the mean of its divisors is an integer number (7645680).

Almost surely, 2^117431231 is an apocalyptic number.

117431231 is a deficient number, since it is larger than the sum of its proper divisors (4899649).

117431231 is a wasteful number, since it uses less digits than its factorization.

117431231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446.

The product of its digits is 504, while the sum is 23.

The square root of 117431231 is about 10836.5691526424. The cubic root of 117431231 is about 489.6974822959.

Adding to 117431231 its reverse (132134711), we get a palindrome (249565942).

The spelling of 117431231 in words is "one hundred seventeen million, four hundred thirty-one thousand, two hundred thirty-one".