43105153401991 has 2 divisors, whose sum is σ = 43105153401992. Its totient is φ = 43105153401990.

The previous prime is 43105153401953. The next prime is 43105153402019. The reversal of 43105153401991 is 19910435150134.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43105153401991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43105153401901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21552576700995 + 21552576700996.

It is an arithmetic number, because the mean of its divisors is an integer number (21552576700996).

Almost surely, 2^{43105153401991} is an apocalyptic number.

43105153401991 is a deficient number, since it is larger than the sum of its proper divisors (1).

43105153401991 is an equidigital number, since it uses as much as digits as its factorization.

43105153401991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 46.

The spelling of 43105153401991 in words is "forty-three trillion, one hundred five billion, one hundred fifty-three million, four hundred one thousand, nine hundred ninety-one".