43145257091 has 2 divisors, whose sum is σ = 43145257092. Its totient is φ = 43145257090.

The previous prime is 43145257069. The next prime is 43145257093. The reversal of 43145257091 is 19075254134.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43145257091 - 2⁶ = 43145257027 is a prime.

Together with 43145257093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43145257093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21572628545 + 21572628546.

It is an arithmetic number, because the mean of its divisors is an integer number (21572628546).

Almost surely, 2^43145257091 is an apocalyptic number.

43145257091 is a deficient number, since it is larger than the sum of its proper divisors (1).

43145257091 is an equidigital number, since it uses as much as digits as its factorization.

43145257091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 43145257091 in words is "forty-three billion, one hundred forty-five million, two hundred fifty-seven thousand, ninety-one".