31293343971443 has 2 divisors, whose sum is σ = 31293343971444. Its totient is φ = 31293343971442.

The previous prime is 31293343971431. The next prime is 31293343971499. The reversal of 31293343971443 is 34417934339213.

It is a happy number.

It is an a-pointer prime, because the next prime (31293343971499) can be obtained adding 31293343971443 to its sum of digits (56).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31293343971443 - 2¹⁰ = 31293343970419 is a prime.

It is not a weakly prime, because it can be changed into another prime (31293343976443) 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, 15646671985721 + 15646671985722.

It is an arithmetic number, because the mean of its divisors is an integer number (15646671985722).

Almost surely, 2^{31293343971443} is an apocalyptic number.

31293343971443 is a deficient number, since it is larger than the sum of its proper divisors (1).

31293343971443 is an equidigital number, since it uses as much as digits as its factorization.

31293343971443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17635968, while the sum is 56.

The spelling of 31293343971443 in words is "thirty-one trillion, two hundred ninety-three billion, three hundred forty-three million, nine hundred seventy-one thousand, four hundred forty-three".