43540166 has 8 divisors (see below), whose sum is σ = 66829224. Its totient is φ = 21263760.

The previous prime is 43540163. The next prime is 43540177. The reversal of 43540166 is 66104534.

It is a happy number.

43540166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43540163) 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 in 3 ways as a sum of consecutive naturals, for example, 253055 + ... + 253226.

It is an arithmetic number, because the mean of its divisors is an integer number (8353653).

Almost surely, 2^43540166 is an apocalyptic number.

43540166 is a deficient number, since it is larger than the sum of its proper divisors (23289058).

43540166 is a wasteful number, since it uses less digits than its factorization.

43540166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506326.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 43540166 is about 6598.4972531630. The cubic root of 43540166 is about 351.8006953263.

The spelling of 43540166 in words is "forty-three million, five hundred forty thousand, one hundred sixty-six".