31400951473 has 2 divisors, whose sum is σ = 31400951474. Its totient is φ = 31400951472.

The previous prime is 31400951459. The next prime is 31400951507. The reversal of 31400951473 is 37415900413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26005755169 + 5395196304 = 161263^2 + 73452^2 .

It is a cyclic number.

It is not a de Polignac number, because 31400951473 - 2⁹ = 31400950961 is a prime.

It is not a weakly prime, because it can be changed into another prime (31400951173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15700475736 + 15700475737.

It is an arithmetic number, because the mean of its divisors is an integer number (15700475737).

Almost surely, 2^31400951473 is an apocalyptic number.

It is an amenable number.

31400951473 is a deficient number, since it is larger than the sum of its proper divisors (1).

31400951473 is an equidigital number, since it uses as much as digits as its factorization.

31400951473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

The spelling of 31400951473 in words is "thirty-one billion, four hundred million, nine hundred fifty-one thousand, four hundred seventy-three".