43163261 has 2 divisors, whose sum is σ = 43163262. Its totient is φ = 43163260.

The previous prime is 43163227. The next prime is 43163303. The reversal of 43163261 is 16236134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33860761 + 9302500 = 5819^2 + 3050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43163261 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 43163261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43163761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21581630 + 21581631.

It is an arithmetic number, because the mean of its divisors is an integer number (21581631).

Almost surely, 2^43163261 is an apocalyptic number.

It is an amenable number.

43163261 is a deficient number, since it is larger than the sum of its proper divisors (1).

43163261 is an equidigital number, since it uses as much as digits as its factorization.

43163261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 26.

The square root of 43163261 is about 6569.8752651782. The cubic root of 43163261 is about 350.7826323309.

Adding to 43163261 its reverse (16236134), we get a palindrome (59399395).

The spelling of 43163261 in words is "forty-three million, one hundred sixty-three thousand, two hundred sixty-one".