31320023017 has 2 divisors, whose sum is σ = 31320023018. Its totient is φ = 31320023016.

The previous prime is 31320022999. The next prime is 31320023023. The reversal of 31320023017 is 71032002313.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20111777856 + 11208245161 = 141816^2 + 105869^2 .

It is a cyclic number.

It is not a de Polignac number, because 31320023017 - 2¹¹ = 31320020969 is a prime.

It is not a weakly prime, because it can be changed into another prime (31320023417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660011508 + 15660011509.

It is an arithmetic number, because the mean of its divisors is an integer number (15660011509).

Almost surely, 2^31320023017 is an apocalyptic number.

It is an amenable number.

31320023017 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320023017 is an equidigital number, since it uses as much as digits as its factorization.

31320023017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 22.

The spelling of 31320023017 in words is "thirty-one billion, three hundred twenty million, twenty-three thousand, seventeen".