31340221447 has 2 divisors, whose sum is σ = 31340221448. Its totient is φ = 31340221446.

The previous prime is 31340221417. The next prime is 31340221457. The reversal of 31340221447 is 74412204313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31340221447 - 2¹⁹ = 31339697159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31340221417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15670110723 + 15670110724.

It is an arithmetic number, because the mean of its divisors is an integer number (15670110724).

Almost surely, 2^31340221447 is an apocalyptic number.

31340221447 is a deficient number, since it is larger than the sum of its proper divisors (1).

31340221447 is an equidigital number, since it uses as much as digits as its factorization.

31340221447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 31.

The spelling of 31340221447 in words is "thirty-one billion, three hundred forty million, two hundred twenty-one thousand, four hundred forty-seven".