31231316423 has 2 divisors, whose sum is σ = 31231316424. Its totient is φ = 31231316422.

The previous prime is 31231316399. The next prime is 31231316449. The reversal of 31231316423 is 32461313213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31231316423 - 2¹⁶ = 31231250887 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31231316023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615658211 + 15615658212.

It is an arithmetic number, because the mean of its divisors is an integer number (15615658212).

Almost surely, 2^31231316423 is an apocalyptic number.

31231316423 is a deficient number, since it is larger than the sum of its proper divisors (1).

31231316423 is an equidigital number, since it uses as much as digits as its factorization.

31231316423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 29.

Adding to 31231316423 its reverse (32461313213), we get a palindrome (63692629636).

The spelling of 31231316423 in words is "thirty-one billion, two hundred thirty-one million, three hundred sixteen thousand, four hundred twenty-three".