43240203191 has 2 divisors, whose sum is σ = 43240203192. Its totient is φ = 43240203190.

The previous prime is 43240203187. The next prime is 43240203247. The reversal of 43240203191 is 19130204234.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43240203191 - 2² = 43240203187 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43240203101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21620101595 + 21620101596.

It is an arithmetic number, because the mean of its divisors is an integer number (21620101596).

Almost surely, 2^43240203191 is an apocalyptic number.

43240203191 is a deficient number, since it is larger than the sum of its proper divisors (1).

43240203191 is an equidigital number, since it uses as much as digits as its factorization.

43240203191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 43240203191 in words is "forty-three billion, two hundred forty million, two hundred three thousand, one hundred ninety-one".