203120031231 has 24 divisors (see below), whose sum is σ = 316902134640. Its totient is φ = 124626007296.

The previous prime is 203120031209. The next prime is 203120031253. The reversal of 203120031231 is 132130021302.

203120031231 is a `hidden beast` number, since 203 + 1 + 200 + 31 + 231 = 666.

It is an interprime number because it is at equal distance from previous prime (203120031209) and next prime (203120031253).

It is not a de Polignac number, because 203120031231 - 2⁵ = 203120031199 is a prime.

It is a super-2 number, since 2×203120031231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203120031731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2536341 + ... + 2615198.

It is an arithmetic number, because the mean of its divisors is an integer number (13204255610).

Almost surely, 2^203120031231 is an apocalyptic number.

203120031231 is a deficient number, since it is larger than the sum of its proper divisors (113782103409).

203120031231 is a wasteful number, since it uses less digits than its factorization.

203120031231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5151895 (or 5151892 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 203120031231 its reverse (132130021302), we get a palindrome (335250052533).

The spelling of 203120031231 in words is "two hundred three billion, one hundred twenty million, thirty-one thousand, two hundred thirty-one".