231659 has 4 divisors (see below), whose sum is σ = 245304. Its totient is φ = 218016.

The previous prime is 231643. The next prime is 231661. The reversal of 231659 is 956132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231659 - 2⁴ = 231643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6797 + ... + 6830.

It is an arithmetic number, because the mean of its divisors is an integer number (61326).

2²³¹⁶⁵⁹ is an apocalyptic number.

231659 is a deficient number, since it is larger than the sum of its proper divisors (13645).

231659 is a wasteful number, since it uses less digits than its factorization.

231659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13644.

The product of its digits is 1620, while the sum is 26.

The square root of 231659 is about 481.3096716252. The cubic root of 231659 is about 61.4162165784.

The spelling of 231659 in words is "two hundred thirty-one thousand, six hundred fifty-nine".