43155231221699 has 2 divisors, whose sum is σ = 43155231221700. Its totient is φ = 43155231221698.

The previous prime is 43155231221653. The next prime is 43155231221771. The reversal of 43155231221699 is 99612213255134.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43155231221699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43155231221699.

It is not a weakly prime, because it can be changed into another prime (43155231221099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21577615610849 + 21577615610850.

It is an arithmetic number, because the mean of its divisors is an integer number (21577615610850).

Almost surely, 2^{43155231221699} is an apocalyptic number.

43155231221699 is a deficient number, since it is larger than the sum of its proper divisors (1).

43155231221699 is an equidigital number, since it uses as much as digits as its factorization.

43155231221699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3499200, while the sum is 53.

The spelling of 43155231221699 in words is "forty-three trillion, one hundred fifty-five billion, two hundred thirty-one million, two hundred twenty-one thousand, six hundred ninety-nine".