16216871 has 4 divisors (see below), whose sum is σ = 17691144. Its totient is φ = 14742600.

The previous prime is 16216831. The next prime is 16216873. The reversal of 16216871 is 17861261.

It is a happy number.

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 16216871 - 2⁶ = 16216807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16216873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 737120 + ... + 737141.

It is an arithmetic number, because the mean of its divisors is an integer number (4422786).

Almost surely, 2^16216871 is an apocalyptic number.

16216871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16216871 is a deficient number, since it is larger than the sum of its proper divisors (1474273).

16216871 is a wasteful number, since it uses less digits than its factorization.

16216871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474272.

The product of its digits is 4032, while the sum is 32.

The square root of 16216871 is about 4027.0176309522. The cubic root of 16216871 is about 253.1176058603.

The spelling of 16216871 in words is "sixteen million, two hundred sixteen thousand, eight hundred seventy-one".