43431134725439 has 2 divisors, whose sum is σ = 43431134725440. Its totient is φ = 43431134725438.

The previous prime is 43431134725379. The next prime is 43431134725477. The reversal of 43431134725439 is 93452743113434.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43431134725439 - 2¹² = 43431134721343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43431134725639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21715567362719 + 21715567362720.

It is an arithmetic number, because the mean of its divisors is an integer number (21715567362720).

Almost surely, 2^{43431134725439} is an apocalyptic number.

43431134725439 is a deficient number, since it is larger than the sum of its proper divisors (1).

43431134725439 is an equidigital number, since it uses as much as digits as its factorization.

43431134725439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13063680, while the sum is 53.

The spelling of 43431134725439 in words is "forty-three trillion, four hundred thirty-one billion, one hundred thirty-four million, seven hundred twenty-five thousand, four hundred thirty-nine".