231135199 has 2 divisors, whose sum is σ = 231135200. Its totient is φ = 231135198.

The previous prime is 231135187. The next prime is 231135239. The reversal of 231135199 is 991531132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231135199 - 2⁷ = 231135071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231135139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115567599 + 115567600.

It is an arithmetic number, because the mean of its divisors is an integer number (115567600).

Almost surely, 2^231135199 is an apocalyptic number.

231135199 is a deficient number, since it is larger than the sum of its proper divisors (1).

231135199 is an equidigital number, since it uses as much as digits as its factorization.

231135199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7290, while the sum is 34.

The square root of 231135199 is about 15203.1312235342. The cubic root of 231135199 is about 613.6989252382.

The spelling of 231135199 in words is "two hundred thirty-one million, one hundred thirty-five thousand, one hundred ninety-nine".