16219216 has 20 divisors (see below), whose sum is σ = 33842452. Its totient is φ = 7485696.

The previous prime is 16219211. The next prime is 16219289. The reversal of 16219216 is 61291261.

It can be written as a sum of positive squares in 2 ways, for example, as 5953600 + 10265616 = 2440^2 + 3204^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16219211) 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, 38781 + ... + 39196.

Almost surely, 2^16219216 is an apocalyptic number.

16219216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16219216 is an abundant number, since it is smaller than the sum of its proper divisors (17623236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16219216 is a wasteful number, since it uses less digits than its factorization.

16219216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77998 (or 77992 counting only the distinct ones).

The product of its digits is 1296, while the sum is 28.

The square root of 16219216 is about 4027.3087788249. The cubic root of 16219216 is about 253.1298057514.

The spelling of 16219216 in words is "sixteen million, two hundred nineteen thousand, two hundred sixteen".