43730261 has 2 divisors, whose sum is σ = 43730262. Its totient is φ = 43730260.

The previous prime is 43730227. The next prime is 43730279. The reversal of 43730261 is 16203734.

43730261 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 can be written as a sum of positive squares in only one way, i.e., 22515025 + 21215236 = 4745^2 + 4606^2 .

It is a cyclic number.

It is not a de Polignac number, because 43730261 - 2¹⁴ = 43713877 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 43730261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43730221) 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, 21865130 + 21865131.

It is an arithmetic number, because the mean of its divisors is an integer number (21865131).

Almost surely, 2^43730261 is an apocalyptic number.

It is an amenable number.

43730261 is a deficient number, since it is larger than the sum of its proper divisors (1).

43730261 is an equidigital number, since it uses as much as digits as its factorization.

43730261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 43730261 is about 6612.8859811734. The cubic root of 43730261 is about 352.3119356297.

Adding to 43730261 its reverse (16203734), we get a palindrome (59933995).

The spelling of 43730261 in words is "forty-three million, seven hundred thirty thousand, two hundred sixty-one".