231312194 has 12 divisors (see below), whose sum is σ = 366192054. Its totient is φ = 109568592.

The previous prime is 231312187. The next prime is 231312203. The reversal of 231312194 is 491213132.

It can be written as a sum of positive squares in only one way, i.e., 190798969 + 40513225 = 13813^2 + 6365^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 159467 + ... + 160910.

Almost surely, 2^231312194 is an apocalyptic number.

231312194 is a deficient number, since it is larger than the sum of its proper divisors (134879860).

231312194 is a wasteful number, since it uses less digits than its factorization.

231312194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320417 (or 320398 counting only the distinct ones).

The product of its digits is 1296, while the sum is 26.

The square root of 231312194 is about 15208.9511143931. The cubic root of 231312194 is about 613.8555347715.

The spelling of 231312194 in words is "two hundred thirty-one million, three hundred twelve thousand, one hundred ninety-four".