31213320002323 has 4 divisors (see below), whose sum is σ = 31242738778128. Its totient is φ = 31183901226520.

The previous prime is 31213320002299. The next prime is 31213320002351. The reversal of 31213320002323 is 32320002331213.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31213320002323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31213320002363) 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, 14709386311 + ... + 14709388432.

It is an arithmetic number, because the mean of its divisors is an integer number (7810684694532).

Almost surely, 2^{31213320002323} is an apocalyptic number.

31213320002323 is a deficient number, since it is larger than the sum of its proper divisors (29418775805).

31213320002323 is a wasteful number, since it uses less digits than its factorization.

31213320002323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29418775804.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 31213320002323 its reverse (32320002331213), we get a palindrome (63533322333536).

The spelling of 31213320002323 in words is "thirty-one trillion, two hundred thirteen billion, three hundred twenty million, two thousand, three hundred twenty-three".