231291116 has 12 divisors (see below), whose sum is σ = 462582288. Its totient is φ = 99124752.

The previous prime is 231291113. The next prime is 231291173. The reversal of 231291116 is 611192132.

231291116 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (231291113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4130171 + ... + 4130226.

It is an arithmetic number, because the mean of its divisors is an integer number (38548524).

Almost surely, 2^231291116 is an apocalyptic number.

It is an amenable number.

231291116 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231291116 is a wasteful number, since it uses less digits than its factorization.

231291116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8260408 (or 8260406 counting only the distinct ones).

The product of its digits is 648, while the sum is 26.

The square root of 231291116 is about 15208.2581514123. The cubic root of 231291116 is about 613.8368886295.

The spelling of 231291116 in words is "two hundred thirty-one million, two hundred ninety-one thousand, one hundred sixteen".