43016535491 has 2 divisors, whose sum is σ = 43016535492. Its totient is φ = 43016535490.

The previous prime is 43016535421. The next prime is 43016535509. The reversal of 43016535491 is 19453561034.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43016535491 - 2²⁶ = 42949426627 is a prime.

It is a super-2 number, since 2×43016535491² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43016535421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21508267745 + 21508267746.

It is an arithmetic number, because the mean of its divisors is an integer number (21508267746).

Almost surely, 2^43016535491 is an apocalyptic number.

43016535491 is a deficient number, since it is larger than the sum of its proper divisors (1).

43016535491 is an equidigital number, since it uses as much as digits as its factorization.

43016535491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 43016535491 in words is "forty-three billion, sixteen million, five hundred thirty-five thousand, four hundred ninety-one".