16216812 has 36 divisors (see below), whose sum is σ = 41996136. Its totient is φ = 5273280.

The previous prime is 16216807. The next prime is 16216819. The reversal of 16216812 is 21861261.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (16216819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4018 + ... + 6969.

Almost surely, 2^16216812 is an apocalyptic number.

16216812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16216812 is an abundant number, since it is smaller than the sum of its proper divisors (25779324).

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

16216812 is a wasteful number, since it uses less digits than its factorization.

16216812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11038 (or 11033 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 16216812 is about 4027.0103054251. The cubic root of 16216812 is about 253.1172988969.

The spelling of 16216812 in words is "sixteen million, two hundred sixteen thousand, eight hundred twelve".