43166401 has 2 divisors, whose sum is σ = 43166402. Its totient is φ = 43166400.

The previous prime is 43166381. The next prime is 43166407. The reversal of 43166401 is 10466134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28143025 + 15023376 = 5305^2 + 3876^2 .

It is a cyclic number.

It is not a de Polignac number, because 43166401 - 2⁵ = 43166369 is a prime.

It is not a weakly prime, because it can be changed into another prime (43166407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21583200 + 21583201.

It is an arithmetic number, because the mean of its divisors is an integer number (21583201).

Almost surely, 2^43166401 is an apocalyptic number.

It is an amenable number.

43166401 is a deficient number, since it is larger than the sum of its proper divisors (1).

43166401 is an equidigital number, since it uses as much as digits as its factorization.

43166401 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 25.

The square root of 43166401 is about 6570.1142303616. The cubic root of 43166401 is about 350.7911382588.

The spelling of 43166401 in words is "forty-three million, one hundred sixty-six thousand, four hundred one".