31032021321947 has 2 divisors, whose sum is σ = 31032021321948. Its totient is φ = 31032021321946.

The previous prime is 31032021321943. The next prime is 31032021322039. The reversal of 31032021321947 is 74912312023013.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31032021321947 - 2² = 31032021321943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31032021321947.

It is not a weakly prime, because it can be changed into another prime (31032021321943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15516010660973 + 15516010660974.

It is an arithmetic number, because the mean of its divisors is an integer number (15516010660974).

Almost surely, 2^{31032021321947} is an apocalyptic number.

31032021321947 is a deficient number, since it is larger than the sum of its proper divisors (1).

31032021321947 is an equidigital number, since it uses as much as digits as its factorization.

31032021321947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 38.

The spelling of 31032021321947 in words is "thirty-one trillion, thirty-two billion, twenty-one million, three hundred twenty-one thousand, nine hundred forty-seven".