231912299 has 2 divisors, whose sum is σ = 231912300. Its totient is φ = 231912298.

The previous prime is 231912269. The next prime is 231912311. The reversal of 231912299 is 992219132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231912299 - 2²⁴ = 215135083 is a prime.

It is not a weakly prime, because it can be changed into another prime (231912269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115956149 + 115956150.

It is an arithmetic number, because the mean of its divisors is an integer number (115956150).

Almost surely, 2^231912299 is an apocalyptic number.

231912299 is a deficient number, since it is larger than the sum of its proper divisors (1).

231912299 is an equidigital number, since it uses as much as digits as its factorization.

231912299 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 38.

The square root of 231912299 is about 15228.6670132353. The cubic root of 231912299 is about 614.3859285805.

The spelling of 231912299 in words is "two hundred thirty-one million, nine hundred twelve thousand, two hundred ninety-nine".