31320023023 has 2 divisors, whose sum is σ = 31320023024. Its totient is φ = 31320023022.

The previous prime is 31320023017. The next prime is 31320023071. The reversal of 31320023023 is 32032002313.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31320023023 - 2²⁹ = 30783152111 is a prime.

It is a super-2 number, since 2×31320023023² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31320023093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660011511 + 15660011512.

It is an arithmetic number, because the mean of its divisors is an integer number (15660011512).

Almost surely, 2^31320023023 is an apocalyptic number.

31320023023 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320023023 is an equidigital number, since it uses as much as digits as its factorization.

31320023023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 31320023023 its reverse (32032002313), we get a palindrome (63352025336).

The spelling of 31320023023 in words is "thirty-one billion, three hundred twenty million, twenty-three thousand, twenty-three".