231194642 has 12 divisors (see below), whose sum is σ = 403411230. Its totient is φ = 99083376.

The previous prime is 231194573. The next prime is 231194653. The reversal of 231194642 is 246491132.

It can be written as a sum of positive squares in only one way, i.e., 183846481 + 47348161 = 13559^2 + 6881^2 .

It is a junction number, because it is equal to n+sod(n) for n = 231194599 and 231194608.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1179467 + ... + 1179662.

Almost surely, 2^231194642 is an apocalyptic number.

231194642 is a deficient number, since it is larger than the sum of its proper divisors (172216588).

231194642 is a wasteful number, since it uses less digits than its factorization.

231194642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2359145 (or 2359138 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 231194642 is about 15205.0860569745. The cubic root of 231194642 is about 613.7515307818.

The spelling of 231194642 in words is "two hundred thirty-one million, one hundred ninety-four thousand, six hundred forty-two".