43023500557399 has 2 divisors, whose sum is σ = 43023500557400. Its totient is φ = 43023500557398.

The previous prime is 43023500557291. The next prime is 43023500557451. The reversal of 43023500557399 is 99375500532034.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43023500557399 - 2⁹ = 43023500556887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43023500357399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21511750278699 + 21511750278700.

It is an arithmetic number, because the mean of its divisors is an integer number (21511750278700).

Almost surely, 2^{43023500557399} is an apocalyptic number.

43023500557399 is a deficient number, since it is larger than the sum of its proper divisors (1).

43023500557399 is an equidigital number, since it uses as much as digits as its factorization.

43023500557399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15309000, while the sum is 55.

The spelling of 43023500557399 in words is "forty-three trillion, twenty-three billion, five hundred million, five hundred fifty-seven thousand, three hundred ninety-nine".