117431855 has 4 divisors (see below), whose sum is σ = 140918232. Its totient is φ = 93945480.

The previous prime is 117431833. The next prime is 117431861. The reversal of 117431855 is 558134711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 558134711 = 43 ⋅12979877.

It is not a de Polignac number, because 117431855 - 2¹⁴ = 117415471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11743181 + ... + 11743190.

It is an arithmetic number, because the mean of its divisors is an integer number (35229558).

Almost surely, 2^117431855 is an apocalyptic number.

117431855 is a deficient number, since it is larger than the sum of its proper divisors (23486377).

117431855 is an equidigital number, since it uses as much as digits as its factorization.

117431855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23486376.

The product of its digits is 16800, while the sum is 35.

The square root of 117431855 is about 10836.5979440044. The cubic root of 117431855 is about 489.6983496708.

The spelling of 117431855 in words is "one hundred seventeen million, four hundred thirty-one thousand, eight hundred fifty-five".