231320099 has 2 divisors, whose sum is σ = 231320100. Its totient is φ = 231320098.

The previous prime is 231320077. The next prime is 231320101. The reversal of 231320099 is 990023132.

231320099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231320099 - 2¹² = 231316003 is a prime.

Together with 231320101, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231320009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115660049 + 115660050.

It is an arithmetic number, because the mean of its divisors is an integer number (115660050).

Almost surely, 2^231320099 is an apocalyptic number.

231320099 is a deficient number, since it is larger than the sum of its proper divisors (1).

231320099 is an equidigital number, since it uses as much as digits as its factorization.

231320099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 231320099 is about 15209.2109920272. The cubic root of 231320099 is about 613.8625274461.

The spelling of 231320099 in words is "two hundred thirty-one million, three hundred twenty thousand, ninety-nine".