312103231031 has 4 divisors (see below), whose sum is σ = 325672936752. Its totient is φ = 298533525312.

The previous prime is 312103230997. The next prime is 312103231039. The reversal of 312103231031 is 130132301213.

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

It is a cyclic number.

It is not a de Polignac number, because 312103231031 - 2²² = 312099036727 is a prime.

It is a super-2 number, since 2×312103231031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312103230994 and 312103231012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312103231039) 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, 6784852826 + ... + 6784852871.

It is an arithmetic number, because the mean of its divisors is an integer number (81418234188).

Almost surely, 2^312103231031 is an apocalyptic number.

312103231031 is a deficient number, since it is larger than the sum of its proper divisors (13569705721).

312103231031 is a wasteful number, since it uses less digits than its factorization.

312103231031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13569705720.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 312103231031 its reverse (130132301213), we get a palindrome (442235532244).

The spelling of 312103231031 in words is "three hundred twelve billion, one hundred three million, two hundred thirty-one thousand, thirty-one".