43019257091 has 2 divisors, whose sum is σ = 43019257092. Its totient is φ = 43019257090.

The previous prime is 43019257081. The next prime is 43019257123. The reversal of 43019257091 is 19075291034.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43019257091 - 2¹⁸ = 43018994947 is a prime.

It is not a weakly prime, because it can be changed into another prime (43019257031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21509628545 + 21509628546.

It is an arithmetic number, because the mean of its divisors is an integer number (21509628546).

Almost surely, 2^43019257091 is an apocalyptic number.

43019257091 is a deficient number, since it is larger than the sum of its proper divisors (1).

43019257091 is an equidigital number, since it uses as much as digits as its factorization.

43019257091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 41.

The spelling of 43019257091 in words is "forty-three billion, nineteen million, two hundred fifty-seven thousand, ninety-one".