40163243 has 2 divisors, whose sum is σ = 40163244. Its totient is φ = 40163242.

The previous prime is 40163237. The next prime is 40163261. The reversal of 40163243 is 34236104.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40163243 - 2⁸ = 40162987 is a prime.

It is a super-2 number, since 2×40163243² = 3226172176554098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40163273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20081621 + 20081622.

It is an arithmetic number, because the mean of its divisors is an integer number (20081622).

Almost surely, 2^40163243 is an apocalyptic number.

40163243 is a deficient number, since it is larger than the sum of its proper divisors (1).

40163243 is an equidigital number, since it uses as much as digits as its factorization.

40163243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 40163243 is about 6337.4476723678. The cubic root of 40163243 is about 342.4597938845.

Adding to 40163243 its reverse (34236104), we get a palindrome (74399347).

The spelling of 40163243 in words is "forty million, one hundred sixty-three thousand, two hundred forty-three".