40115443 has 2 divisors, whose sum is σ = 40115444. Its totient is φ = 40115442.

The previous prime is 40115423. The next prime is 40115447. The reversal of 40115443 is 34451104.

40115443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40115443 - 2⁹ = 40114931 is a prime.

It is not a weakly prime, because it can be changed into another prime (40115447) 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, 20057721 + 20057722.

It is an arithmetic number, because the mean of its divisors is an integer number (20057722).

Almost surely, 2^40115443 is an apocalyptic number.

40115443 is a deficient number, since it is larger than the sum of its proper divisors (1).

40115443 is an equidigital number, since it uses as much as digits as its factorization.

40115443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 40115443 is about 6333.6753153284. The cubic root of 40115443 is about 342.3238812500.

Adding to 40115443 its reverse (34451104), we get a palindrome (74566547).

The spelling of 40115443 in words is "forty million, one hundred fifteen thousand, four hundred forty-three".