16218871 has 2 divisors, whose sum is σ = 16218872. Its totient is φ = 16218870.

The previous prime is 16218857. The next prime is 16218877. The reversal of 16218871 is 17881261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16218871 - 2¹³ = 16210679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16218877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8109435 + 8109436.

It is an arithmetic number, because the mean of its divisors is an integer number (8109436).

Almost surely, 2^16218871 is an apocalyptic number.

16218871 is a deficient number, since it is larger than the sum of its proper divisors (1).

16218871 is an equidigital number, since it uses as much as digits as its factorization.

16218871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 34.

The square root of 16218871 is about 4027.2659460234. The cubic root of 16218871 is about 253.1280109584.

The spelling of 16218871 in words is "sixteen million, two hundred eighteen thousand, eight hundred seventy-one".