231355 has 4 divisors (see below), whose sum is σ = 277632. Its totient is φ = 185080.

The previous prime is 231349. The next prime is 231359. The reversal of 231355 is 553132.

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

It is not a de Polignac number, because 231355 - 2³ = 231347 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, 23131 + ... + 23140.

It is an arithmetic number, because the mean of its divisors is an integer number (69408).

2²³¹³⁵⁵ is an apocalyptic number.

231355 is a deficient number, since it is larger than the sum of its proper divisors (46277).

231355 is an equidigital number, since it uses as much as digits as its factorization.

231355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46276.

The product of its digits is 450, while the sum is 19.

The square root of 231355 is about 480.9937629533. The cubic root of 231355 is about 61.3893398576.

Adding to 231355 its reverse (553132), we get a palindrome (784487).

It can be divided in two parts, 23 and 1355, that added together give a triangular number (1378 = T₅₂).

The spelling of 231355 in words is "two hundred thirty-one thousand, three hundred fifty-five".