31312220023 has 8 divisors (see below), whose sum is σ = 35833563648. Its totient is φ = 26802918744.

The previous prime is 31312220011. The next prime is 31312220041. The reversal of 31312220023 is 32002221313.

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

It is a de Polignac number, because none of the positive numbers 2^k-31312220023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312221023) 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, 3005011 + ... + 3015412.

It is an arithmetic number, because the mean of its divisors is an integer number (4479195456).

Almost surely, 2^31312220023 is an apocalyptic number.

31312220023 is a deficient number, since it is larger than the sum of its proper divisors (4521343625).

31312220023 is an equidigital number, since it uses as much as digits as its factorization.

31312220023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6021173.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 31312220023 its reverse (32002221313), we get a palindrome (63314441336).

The spelling of 31312220023 in words is "thirty-one billion, three hundred twelve million, two hundred twenty thousand, twenty-three".