43420171 has 4 divisors (see below), whose sum is σ = 43438032. Its totient is φ = 43402312.

The previous prime is 43420133. The next prime is 43420199. The reversal of 43420171 is 17102434.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43420171 - 2⁷ = 43420043 is a prime.

It is a super-2 number, since 2×43420171² = 3770622499338482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43426171) 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 in 3 ways as a sum of consecutive naturals, for example, 4576 + ... + 10381.

It is an arithmetic number, because the mean of its divisors is an integer number (10859508).

Almost surely, 2^43420171 is an apocalyptic number.

43420171 is a deficient number, since it is larger than the sum of its proper divisors (17861).

43420171 is a wasteful number, since it uses less digits than its factorization.

43420171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17860.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 43420171 is about 6589.3983792149. The cubic root of 43420171 is about 351.4772149774.

The spelling of 43420171 in words is "forty-three million, four hundred twenty thousand, one hundred seventy-one".