440216171 has 2 divisors, whose sum is σ = 440216172. Its totient is φ = 440216170.

The previous prime is 440216141. The next prime is 440216191. The reversal of 440216171 is 171612044.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440216171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 440216171.

It is not a weakly prime, because it can be changed into another prime (440216131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220108085 + 220108086.

It is an arithmetic number, because the mean of its divisors is an integer number (220108086).

Almost surely, 2^440216171 is an apocalyptic number.

440216171 is a deficient number, since it is larger than the sum of its proper divisors (1).

440216171 is an equidigital number, since it uses as much as digits as its factorization.

440216171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 440216171 is about 20981.3291047064. The cubic root of 440216171 is about 760.7150305528.

The spelling of 440216171 in words is "four hundred forty million, two hundred sixteen thousand, one hundred seventy-one".