231191422 has 32 divisors (see below), whose sum is σ = 447275520. Its totient is φ = 86966880.

The previous prime is 231191413. The next prime is 231191453. The reversal of 231191422 is 224191132.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21418 + ... + 30349.

It is an arithmetic number, because the mean of its divisors is an integer number (13977360).

Almost surely, 2^231191422 is an apocalyptic number.

231191422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231191422 is a deficient number, since it is larger than the sum of its proper divisors (216084098).

231191422 is a wasteful number, since it uses less digits than its factorization.

231191422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51816.

The product of its digits is 864, while the sum is 25.

The square root of 231191422 is about 15204.9801709835. The cubic root of 231191422 is about 613.7486813947.

The spelling of 231191422 in words is "two hundred thirty-one million, one hundred ninety-one thousand, four hundred twenty-two".