231593 has 4 divisors (see below), whose sum is σ = 233988. Its totient is φ = 229200.

The previous prime is 231589. The next prime is 231599. The reversal of 231593 is 395132.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 157609 + 73984 = 397^2 + 272^2 .

It is a cyclic number.

It is not a de Polignac number, because 231593 - 2² = 231589 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (231599) 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, 1046 + ... + 1247.

It is an arithmetic number, because the mean of its divisors is an integer number (58497).

2²³¹⁵⁹³ is an apocalyptic number.

It is an amenable number.

231593 is a deficient number, since it is larger than the sum of its proper divisors (2395).

231593 is a wasteful number, since it uses less digits than its factorization.

231593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2394.

The product of its digits is 810, while the sum is 23.

The square root of 231593 is about 481.2411038139. The cubic root of 231593 is about 61.4103835000.

The spelling of 231593 in words is "two hundred thirty-one thousand, five hundred ninety-three".