231520199 has 2 divisors, whose sum is σ = 231520200. Its totient is φ = 231520198.

The previous prime is 231520171. The next prime is 231520243. The reversal of 231520199 is 991025132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231520199 - 2⁸ = 231519943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231520129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115760099 + 115760100.

It is an arithmetic number, because the mean of its divisors is an integer number (115760100).

Almost surely, 2^231520199 is an apocalyptic number.

231520199 is a deficient number, since it is larger than the sum of its proper divisors (1).

231520199 is an equidigital number, since it uses as much as digits as its factorization.

231520199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 231520199 is about 15215.7878205501. The cubic root of 231520199 is about 614.0394806389.

The spelling of 231520199 in words is "two hundred thirty-one million, five hundred twenty thousand, one hundred ninety-nine".