231228199 has 2 divisors, whose sum is σ = 231228200. Its totient is φ = 231228198.

The previous prime is 231228161. The next prime is 231228209. The reversal of 231228199 is 991822132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231228199 - 2²⁵ = 197673767 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231258199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115614099 + 115614100.

It is an arithmetic number, because the mean of its divisors is an integer number (115614100).

Almost surely, 2^231228199 is an apocalyptic number.

231228199 is a deficient number, since it is larger than the sum of its proper divisors (1).

231228199 is an equidigital number, since it uses as much as digits as its factorization.

231228199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 37.

The square root of 231228199 is about 15206.1894963860. The cubic root of 231228199 is about 613.7812238917.

The spelling of 231228199 in words is "two hundred thirty-one million, two hundred twenty-eight thousand, one hundred ninety-nine".