231859 has 2 divisors, whose sum is σ = 231860. Its totient is φ = 231858.

The previous prime is 231841. The next prime is 231871. The reversal of 231859 is 958132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231859 - 2⁵ = 231827 is a prime.

It is not a weakly prime, because it can be changed into another prime (231809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115929 + 115930.

It is an arithmetic number, because the mean of its divisors is an integer number (115930).

2²³¹⁸⁵⁹ is an apocalyptic number.

231859 is a deficient number, since it is larger than the sum of its proper divisors (1).

231859 is an equidigital number, since it uses as much as digits as its factorization.

231859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 231859 is about 481.5173932476. The cubic root of 231859 is about 61.4338858108.

The spelling of 231859 in words is "two hundred thirty-one thousand, eight hundred fifty-nine".