31240440267473 has 2 divisors, whose sum is σ = 31240440267474. Its totient is φ = 31240440267472.

The previous prime is 31240440267457. The next prime is 31240440267503. The reversal of 31240440267473 is 37476204404213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26695284895504 + 4545155371969 = 5166748^2 + 2131937^2 .

It is an emirp because it is prime and its reverse (37476204404213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31240440267473 - 2⁴ = 31240440267457 is a prime.

It is not a weakly prime, because it can be changed into another prime (31240440267403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15620220133736 + 15620220133737.

It is an arithmetic number, because the mean of its divisors is an integer number (15620220133737).

Almost surely, 2^{31240440267473} is an apocalyptic number.

It is an amenable number.

31240440267473 is a deficient number, since it is larger than the sum of its proper divisors (1).

31240440267473 is an equidigital number, since it uses as much as digits as its factorization.

31240440267473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2709504, while the sum is 47.

The spelling of 31240440267473 in words is "thirty-one trillion, two hundred forty billion, four hundred forty million, two hundred sixty-seven thousand, four hundred seventy-three".