231345392 has 20 divisors (see below), whose sum is σ = 448489896. Its totient is φ = 115606080.

The previous prime is 231345353. The next prime is 231345397. The reversal of 231345392 is 293543132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231345397) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 36542 + ... + 42402.

Almost surely, 2^231345392 is an apocalyptic number.

It is an amenable number.

231345392 is a deficient number, since it is larger than the sum of its proper divisors (217144504).

231345392 is a wasteful number, since it uses less digits than its factorization.

231345392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8336 (or 8330 counting only the distinct ones).

The product of its digits is 19440, while the sum is 32.

The square root of 231345392 is about 15210.0424719986. The cubic root of 231345392 is about 613.8849002808.

The spelling of 231345392 in words is "two hundred thirty-one million, three hundred forty-five thousand, three hundred ninety-two".