31340221417 has 2 divisors, whose sum is σ = 31340221418. Its totient is φ = 31340221416.

The previous prime is 31340221357. The next prime is 31340221447. The reversal of 31340221417 is 71412204313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24557710681 + 6782510736 = 156709^2 + 82356^2 .

It is a cyclic number.

It is not a de Polignac number, because 31340221417 - 2¹¹ = 31340219369 is a prime.

It is not a weakly prime, because it can be changed into another prime (31340221447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15670110708 + 15670110709.

It is an arithmetic number, because the mean of its divisors is an integer number (15670110709).

Almost surely, 2^31340221417 is an apocalyptic number.

It is an amenable number.

31340221417 is a deficient number, since it is larger than the sum of its proper divisors (1).

31340221417 is an equidigital number, since it uses as much as digits as its factorization.

31340221417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The spelling of 31340221417 in words is "thirty-one billion, three hundred forty million, two hundred twenty-one thousand, four hundred seventeen".