31512343323 has 4 divisors (see below), whose sum is σ = 42016457768. Its totient is φ = 21008228880.

The previous prime is 31512343319. The next prime is 31512343333. The reversal of 31512343323 is 32334321513.

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

It is not a de Polignac number, because 31512343323 - 2² = 31512343319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31512343333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5252057218 + ... + 5252057223.

It is an arithmetic number, because the mean of its divisors is an integer number (10504114442).

Almost surely, 2^31512343323 is an apocalyptic number.

31512343323 is a deficient number, since it is larger than the sum of its proper divisors (10504114445).

31512343323 is a wasteful number, since it uses less digits than its factorization.

31512343323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10504114444.

The product of its digits is 19440, while the sum is 30.

Adding to 31512343323 its reverse (32334321513), we get a palindrome (63846664836).

The spelling of 31512343323 in words is "thirty-one billion, five hundred twelve million, three hundred forty-three thousand, three hundred twenty-three".