231502 has 4 divisors (see below), whose sum is σ = 347256. Its totient is φ = 115750.

The previous prime is 231493. The next prime is 231503. The reversal of 231502 is 205132.

231502 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

231502 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231503) by changing a digit.

231502 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57874 + ... + 57877.

It is an arithmetic number, because the mean of its divisors is an integer number (86814).

2²³¹⁵⁰² is an apocalyptic number.

231502 is a deficient number, since it is larger than the sum of its proper divisors (115754).

231502 is a wasteful number, since it uses less digits than its factorization.

231502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115753.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 231502 is about 481.1465473221. The cubic root of 231502 is about 61.4023391046.

Adding to 231502 its reverse (205132), we get a palindrome (436634).

The spelling of 231502 in words is "two hundred thirty-one thousand, five hundred two".