31131323023 has 8 divisors (see below), whose sum is σ = 31511693808. Its totient is φ = 30751078464.

The previous prime is 31131323017. The next prime is 31131323029. The reversal of 31131323023 is 32032313113.

It is an interprime number because it is at equal distance from previous prime (31131323017) and next prime (31131323029).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31131323023 - 2¹⁷ = 31131191951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31131322985 and 31131323003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31131323029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 524011 + ... + 580387.

It is an arithmetic number, because the mean of its divisors is an integer number (3938961726).

Almost surely, 2^31131323023 is an apocalyptic number.

31131323023 is a deficient number, since it is larger than the sum of its proper divisors (380370785).

31131323023 is an equidigital number, since it uses as much as digits as its factorization.

31131323023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63113.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31131323023 its reverse (32032313113), we get a palindrome (63163636136).

The spelling of 31131323023 in words is "thirty-one billion, one hundred thirty-one million, three hundred twenty-three thousand, twenty-three".