1231023031 has 12 divisors (see below), whose sum is σ = 1432632072. Its totient is φ = 1054701648.

The previous prime is 1231023007. The next prime is 1231023067. The reversal of 1231023031 is 1303201321.

It is not a de Polignac number, because 1231023031 - 2⁹ = 1231022519 is a prime.

It is a super-2 number, since 2×1231023031² = 3030835405704853922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231022996 and 1231023014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231023331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155536 + ... + 163258.

It is an arithmetic number, because the mean of its divisors is an integer number (119386006).

Almost surely, 2^1231023031 is an apocalyptic number.

1231023031 is a deficient number, since it is larger than the sum of its proper divisors (201609041).

1231023031 is an equidigital number, since it uses as much as digits as its factorization.

1231023031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10990 (or 10983 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1231023031 is about 35085.9377956468. The cubic root of 1231023031 is about 1071.7382382224.

Adding to 1231023031 its reverse (1303201321), we get a palindrome (2534224352).

The spelling of 1231023031 in words is "one billion, two hundred thirty-one million, twenty-three thousand, thirty-one".