231216253 has 4 divisors (see below), whose sum is σ = 231372000. Its totient is φ = 231060508.

The previous prime is 231216247. The next prime is 231216283. The reversal of 231216253 is 352612132.

231216253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231216253 - 2²¹ = 229119101 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 (231216233) 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, 75625 + ... + 78622.

It is an arithmetic number, because the mean of its divisors is an integer number (57843000).

Almost surely, 2^231216253 is an apocalyptic number.

It is an amenable number.

231216253 is a deficient number, since it is larger than the sum of its proper divisors (155747).

231216253 is a wasteful number, since it uses less digits than its factorization.

231216253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155746.

The product of its digits is 2160, while the sum is 25.

The square root of 231216253 is about 15205.7966907361. The cubic root of 231216253 is about 613.7706537323.

Adding to 231216253 its reverse (352612132), we get a palindrome (583828385).

The spelling of 231216253 in words is "two hundred thirty-one million, two hundred sixteen thousand, two hundred fifty-three".