43081663 has 2 divisors, whose sum is σ = 43081664. Its totient is φ = 43081662.

The previous prime is 43081639. The next prime is 43081667. The reversal of 43081663 is 36618034.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43081663 - 2⁵ = 43081631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43081667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21540831 + 21540832.

It is an arithmetic number, because the mean of its divisors is an integer number (21540832).

Almost surely, 2^43081663 is an apocalyptic number.

43081663 is a deficient number, since it is larger than the sum of its proper divisors (1).

43081663 is an equidigital number, since it uses as much as digits as its factorization.

43081663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 43081663 is about 6563.6623161159. The cubic root of 43081663 is about 350.5614471808.

Adding to 43081663 its reverse (36618034), we get a palindrome (79699697).

The spelling of 43081663 in words is "forty-three million, eighty-one thousand, six hundred sixty-three".