231599 has 2 divisors, whose sum is σ = 231600. Its totient is φ = 231598.

The previous prime is 231589. The next prime is 231607. The reversal of 231599 is 995132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231599 - 2¹⁶ = 166063 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115799 + 115800.

It is an arithmetic number, because the mean of its divisors is an integer number (115800).

2²³¹⁵⁹⁹ is an apocalyptic number.

231599 is a deficient number, since it is larger than the sum of its proper divisors (1).

231599 is an equidigital number, since it uses as much as digits as its factorization.

231599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2430, while the sum is 29.

The square root of 231599 is about 481.2473376550. The cubic root of 231599 is about 61.4109138256.

The spelling of 231599 in words is "two hundred thirty-one thousand, five hundred ninety-nine".