16999216 has 20 divisors (see below), whose sum is σ = 35469952. Its totient is φ = 7845696.

The previous prime is 16999211. The next prime is 16999219. The reversal of 16999216 is 61299961.

It is a super-2 number, since 2×16999216² = 577946689229312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16999211) 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, 40656 + ... + 41071.

Almost surely, 2^16999216 is an apocalyptic number.

16999216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16999216 is an abundant number, since it is smaller than the sum of its proper divisors (18470736).

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

16999216 is a wasteful number, since it uses less digits than its factorization.

16999216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81748 (or 81742 counting only the distinct ones).

The product of its digits is 52488, while the sum is 43.

The square root of 16999216 is about 4123.0105505565. The cubic root of 16999216 is about 257.1242062898.

The spelling of 16999216 in words is "sixteen million, nine hundred ninety-nine thousand, two hundred sixteen".