231501199 has 2 divisors, whose sum is σ = 231501200. Its totient is φ = 231501198.

The previous prime is 231501197. The next prime is 231501227. The reversal of 231501199 is 991105132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231501199 - 2¹ = 231501197 is a prime.

Together with 231501197, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 231501199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231501197) 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, 115750599 + 115750600.

It is an arithmetic number, because the mean of its divisors is an integer number (115750600).

Almost surely, 2^231501199 is an apocalyptic number.

231501199 is a deficient number, since it is larger than the sum of its proper divisors (1).

231501199 is an equidigital number, since it uses as much as digits as its factorization.

231501199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 231501199 is about 15215.1634562367. The cubic root of 231501199 is about 614.0226828687.

The spelling of 231501199 in words is "two hundred thirty-one million, five hundred one thousand, one hundred ninety-nine".