231998492 has 48 divisors (see below), whose sum is σ = 462520800. Its totient is φ = 100853760.

The previous prime is 231998491. The next prime is 231998497. The reversal of 231998492 is 294899132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231998491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143384 + ... + 144992.

It is an arithmetic number, because the mean of its divisors is an integer number (9635850).

Almost surely, 2^231998492 is an apocalyptic number.

231998492 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

231998492 is a deficient number, since it is larger than the sum of its proper divisors (230522308).

231998492 is a wasteful number, since it uses less digits than its factorization.

231998492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766 (or 1764 counting only the distinct ones).

The product of its digits is 279936, while the sum is 47.

The square root of 231998492 is about 15231.4967091222. The cubic root of 231998492 is about 614.4620337970.

The spelling of 231998492 in words is "two hundred thirty-one million, nine hundred ninety-eight thousand, four hundred ninety-two".