231432253 has 4 divisors (see below), whose sum is σ = 249234748. Its totient is φ = 213629760.

The previous prime is 231432247. The next prime is 231432259. The reversal of 231432253 is 352234132.

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

It is an interprime number because it is at equal distance from previous prime (231432247) and next prime (231432259).

It can be written as a sum of positive squares in 2 ways, for example, as 51523684 + 179908569 = 7178^2 + 13413^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231432253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231432259) 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, 8901228 + ... + 8901253.

It is an arithmetic number, because the mean of its divisors is an integer number (62308687).

Almost surely, 2^231432253 is an apocalyptic number.

It is an amenable number.

231432253 is a deficient number, since it is larger than the sum of its proper divisors (17802495).

231432253 is a wasteful number, since it uses less digits than its factorization.

231432253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17802494.

The product of its digits is 4320, while the sum is 25.

The square root of 231432253 is about 15212.8975872448. The cubic root of 231432253 is about 613.9617204612.

Adding to 231432253 its reverse (352234132), we get a palindrome (583666385).

The spelling of 231432253 in words is "two hundred thirty-one million, four hundred thirty-two thousand, two hundred fifty-three".