231866099 has 2 divisors, whose sum is σ = 231866100. Its totient is φ = 231866098.

The previous prime is 231866053. The next prime is 231866113. The reversal of 231866099 is 990668132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231866099 - 2²⁰ = 230817523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231860099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115933049 + 115933050.

It is an arithmetic number, because the mean of its divisors is an integer number (115933050).

Almost surely, 2^231866099 is an apocalyptic number.

231866099 is a deficient number, since it is larger than the sum of its proper divisors (1).

231866099 is an equidigital number, since it uses as much as digits as its factorization.

231866099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 231866099 is about 15227.1500616498. The cubic root of 231866099 is about 614.3451279343.

The spelling of 231866099 in words is "two hundred thirty-one million, eight hundred sixty-six thousand, ninety-nine".