43281771493 has 2 divisors, whose sum is σ = 43281771494. Its totient is φ = 43281771492.

The previous prime is 43281771431. The next prime is 43281771517. The reversal of 43281771493 is 39417718234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42984484929 + 297286564 = 207327^2 + 17242^2 .

It is a cyclic number.

It is not a de Polignac number, because 43281771493 - 2¹⁷ = 43281640421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43281771193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21640885746 + 21640885747.

It is an arithmetic number, because the mean of its divisors is an integer number (21640885747).

Almost surely, 2^43281771493 is an apocalyptic number.

It is an amenable number.

43281771493 is a deficient number, since it is larger than the sum of its proper divisors (1).

43281771493 is an equidigital number, since it uses as much as digits as its factorization.

43281771493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 49.

The spelling of 43281771493 in words is "forty-three billion, two hundred eighty-one million, seven hundred seventy-one thousand, four hundred ninety-three".