31322009947 has 2 divisors, whose sum is σ = 31322009948. Its totient is φ = 31322009946.

The previous prime is 31322009911. The next prime is 31322010001. The reversal of 31322009947 is 74990022313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31322009947 - 2¹⁵ = 31321977179 is a prime.

It is not a weakly prime, because it can be changed into another prime (31322009347) 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, 15661004973 + 15661004974.

It is an arithmetic number, because the mean of its divisors is an integer number (15661004974).

Almost surely, 2^31322009947 is an apocalyptic number.

31322009947 is a deficient number, since it is larger than the sum of its proper divisors (1).

31322009947 is an equidigital number, since it uses as much as digits as its factorization.

31322009947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 40.

The spelling of 31322009947 in words is "thirty-one billion, three hundred twenty-two million, nine thousand, nine hundred forty-seven".