16219871 has 4 divisors (see below), whose sum is σ = 16284744. Its totient is φ = 16155000.

The previous prime is 16219849. The next prime is 16219873. The reversal of 16219871 is 17891261.

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 16219871 - 2¹⁰ = 16218847 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 (16219873) 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, 32060 + ... + 32561.

It is an arithmetic number, because the mean of its divisors is an integer number (4071186).

Almost surely, 2^16219871 is an apocalyptic number.

16219871 is a deficient number, since it is larger than the sum of its proper divisors (64873).

16219871 is an equidigital number, since it uses as much as digits as its factorization.

16219871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64872.

The product of its digits is 6048, while the sum is 35.

The square root of 16219871 is about 4027.3900978177. The cubic root of 16219871 is about 253.1332131867.

The spelling of 16219871 in words is "sixteen million, two hundred nineteen thousand, eight hundred seventy-one".