231210253 has 4 divisors (see below), whose sum is σ = 231759868. Its totient is φ = 230660640.

The previous prime is 231210227. The next prime is 231210263. The reversal of 231210253 is 352012132.

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 16499844 + 214710409 = 4062^2 + 14653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231210253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231210253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231210223) 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, 274176 + ... + 275017.

It is an arithmetic number, because the mean of its divisors is an integer number (57939967).

Almost surely, 2^231210253 is an apocalyptic number.

It is an amenable number.

231210253 is a deficient number, since it is larger than the sum of its proper divisors (549615).

231210253 is an equidigital number, since it uses as much as digits as its factorization.

231210253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549614.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 231210253 is about 15205.5993962750. The cubic root of 231210253 is about 613.7653446249.

Adding to 231210253 its reverse (352012132), we get a palindrome (583222385).

The spelling of 231210253 in words is "two hundred thirty-one million, two hundred ten thousand, two hundred fifty-three".