31212431323 has 4 divisors (see below), whose sum is σ = 31272111448. Its totient is φ = 31152751200.

The previous prime is 31212431297. The next prime is 31212431351. The reversal of 31212431323 is 32313421213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32313421213 = 9749 ⋅3314537.

It is a cyclic number.

It is not a de Polignac number, because 31212431323 - 2⁵ = 31212431291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31212431363) 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, 29839278 + ... + 29840323.

It is an arithmetic number, because the mean of its divisors is an integer number (7818027862).

Almost surely, 2^31212431323 is an apocalyptic number.

31212431323 is a deficient number, since it is larger than the sum of its proper divisors (59680125).

31212431323 is an equidigital number, since it uses as much as digits as its factorization.

31212431323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59680124.

The product of its digits is 2592, while the sum is 25.

Adding to 31212431323 its reverse (32313421213), we get a palindrome (63525852536).

The spelling of 31212431323 in words is "thirty-one billion, two hundred twelve million, four hundred thirty-one thousand, three hundred twenty-three".