31544646281243 has 2 divisors, whose sum is σ = 31544646281244. Its totient is φ = 31544646281242.

The previous prime is 31544646281221. The next prime is 31544646281293. The reversal of 31544646281243 is 34218264644513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31544646281243 - 2¹² = 31544646277147 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (31544646281293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15772323140621 + 15772323140622.

It is an arithmetic number, because the mean of its divisors is an integer number (15772323140622).

Almost surely, 2^{31544646281243} is an apocalyptic number.

31544646281243 is a deficient number, since it is larger than the sum of its proper divisors (1).

31544646281243 is an equidigital number, since it uses as much as digits as its factorization.

31544646281243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13271040, while the sum is 53.

The spelling of 31544646281243 in words is "thirty-one trillion, five hundred forty-four billion, six hundred forty-six million, two hundred eighty-one thousand, two hundred forty-three".