31021324423 has 4 divisors (see below), whose sum is σ = 31369878720. Its totient is φ = 30672770128.

The previous prime is 31021324417. The next prime is 31021324441. The reversal of 31021324423 is 32442312013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32442312013 = 39761 ⋅815933.

It is a cyclic number.

It is not a de Polignac number, because 31021324423 - 2²⁵ = 30987769991 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 (31021324723) 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, 174277015 + ... + 174277192.

It is an arithmetic number, because the mean of its divisors is an integer number (7842469680).

Almost surely, 2^31021324423 is an apocalyptic number.

31021324423 is a deficient number, since it is larger than the sum of its proper divisors (348554297).

31021324423 is an equidigital number, since it uses as much as digits as its factorization.

31021324423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348554296.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31021324423 its reverse (32442312013), we get a palindrome (63463636436).

The spelling of 31021324423 in words is "thirty-one billion, twenty-one million, three hundred twenty-four thousand, four hundred twenty-three".