31423465217 has 2 divisors, whose sum is σ = 31423465218. Its totient is φ = 31423465216.

The previous prime is 31423465211. The next prime is 31423465247. The reversal of 31423465217 is 71256432413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27486655681 + 3936809536 = 165791^2 + 62744^2 .

It is a cyclic number.

It is not a de Polignac number, because 31423465217 - 2¹⁶ = 31423399681 is a prime.

It is not a weakly prime, because it can be changed into another prime (31423465211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711732608 + 15711732609.

It is an arithmetic number, because the mean of its divisors is an integer number (15711732609).

Almost surely, 2^31423465217 is an apocalyptic number.

It is an amenable number.

31423465217 is a deficient number, since it is larger than the sum of its proper divisors (1).

31423465217 is an equidigital number, since it uses as much as digits as its factorization.

31423465217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 38.

The spelling of 31423465217 in words is "thirty-one billion, four hundred twenty-three million, four hundred sixty-five thousand, two hundred seventeen".