231559 has 2 divisors, whose sum is σ = 231560. Its totient is φ = 231558.

The previous prime is 231551. The next prime is 231563. The reversal of 231559 is 955132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231559 - 2³ = 231551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115779 + 115780.

It is an arithmetic number, because the mean of its divisors is an integer number (115780).

2²³¹⁵⁵⁹ is an apocalyptic number.

231559 is a deficient number, since it is larger than the sum of its proper divisors (1).

231559 is an equidigital number, since it uses as much as digits as its factorization.

231559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1350, while the sum is 25.

The square root of 231559 is about 481.2057771889. The cubic root of 231559 is about 61.4073781483.

The spelling of 231559 in words is "two hundred thirty-one thousand, five hundred fifty-nine".