16216447 has 4 divisors (see below), whose sum is σ = 17463880. Its totient is φ = 14969016.

The previous prime is 16216433. The next prime is 16216451. The reversal of 16216447 is 74461261.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16216447 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 (16216427) 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, 623697 + ... + 623722.

It is an arithmetic number, because the mean of its divisors is an integer number (4365970).

Almost surely, 2^16216447 is an apocalyptic number.

16216447 is a deficient number, since it is larger than the sum of its proper divisors (1247433).

16216447 is a wasteful number, since it uses less digits than its factorization.

16216447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247432.

The product of its digits is 8064, while the sum is 31.

The square root of 16216447 is about 4026.9649861900. The cubic root of 16216447 is about 253.1153998696.

The spelling of 16216447 in words is "sixteen million, two hundred sixteen thousand, four hundred forty-seven".