203112031031 has 72 divisors (see below), whose sum is σ = 268162907040. Its totient is φ = 149626673280.

The previous prime is 203112031021. The next prime is 203112031063. The reversal of 203112031031 is 130130211302.

It is a de Polignac number, because none of the positive numbers 2^k-203112031031 is a prime.

It is a super-2 number, since 2×203112031031² (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 (203112031021) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 717710216 + ... + 717710498.

It is an arithmetic number, because the mean of its divisors is an integer number (3724484820).

Almost surely, 2^203112031031 is an apocalyptic number.

203112031031 is a deficient number, since it is larger than the sum of its proper divisors (65050876009).

203112031031 is an equidigital number, since it uses as much as digits as its factorization.

203112031031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 203112031031 its reverse (130130211302), we get a palindrome (333242242333).

The spelling of 203112031031 in words is "two hundred three billion, one hundred twelve million, thirty-one thousand, thirty-one".