16216530 has 64 divisors (see below), whose sum is σ = 42864768. Its totient is φ = 3893760.

The previous prime is 16216523. The next prime is 16216531. The reversal of 16216530 is 3561261.

It is a self number, because there is not a number n which added to its sum of digits gives 16216530.

It is not an unprimeable number, because it can be changed into a prime (16216531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51654 + ... + 51966.

It is an arithmetic number, because the mean of its divisors is an integer number (669762).

Almost surely, 2^16216530 is an apocalyptic number.

16216530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16216530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21432384).

16216530 is an abundant number, since it is smaller than the sum of its proper divisors (26648238).

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

16216530 is a wasteful number, since it uses less digits than its factorization.

16216530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 16216530 is about 4026.9752917047. The cubic root of 16216530 is about 253.1158317057.

Adding to 16216530 its reverse (3561261), we get a palindrome (19777791).

The spelling of 16216530 in words is "sixteen million, two hundred sixteen thousand, five hundred thirty".