31000313023 has 4 divisors (see below), whose sum is σ = 31061944368. Its totient is φ = 30938681680.

The previous prime is 31000313021. The next prime is 31000313087. The reversal of 31000313023 is 32031300013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32031300013 = 1409 ⋅22733357.

It is a cyclic number.

It is not a de Polignac number, because 31000313023 - 2¹ = 31000313021 is a prime.

It is a super-2 number, since 2×31000313023² (a number of 22 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 = 31000312988 and 31000313006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31000313021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30814918 + ... + 30815923.

It is an arithmetic number, because the mean of its divisors is an integer number (7765486092).

Almost surely, 2^31000313023 is an apocalyptic number.

31000313023 is a deficient number, since it is larger than the sum of its proper divisors (61631345).

31000313023 is an equidigital number, since it uses as much as digits as its factorization.

31000313023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61631344.

The product of its (nonzero) digits is 162, while the sum is 16.

Adding to 31000313023 its reverse (32031300013), we get a palindrome (63031613036).

The spelling of 31000313023 in words is "thirty-one billion, three hundred thirteen thousand, twenty-three".