16381212 has 24 divisors (see below), whose sum is σ = 38685696. Its totient is φ = 5394288.

The previous prime is 16381207. The next prime is 16381231. The reversal of 16381212 is 21218361.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7228 + ... + 9219.

It is an arithmetic number, because the mean of its divisors is an integer number (1611904).

Almost surely, 2^16381212 is an apocalyptic number.

16381212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16381212 is an abundant number, since it is smaller than the sum of its proper divisors (22304484).

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

16381212 is a wasteful number, since it uses less digits than its factorization.

16381212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16537 (or 16535 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 16381212 is about 4047.3709985619. The cubic root of 16381212 is about 253.9697610064.

Adding to 16381212 its reverse (21218361), we get a palindrome (37599573).

It can be divided in two parts, 1638 and 1212, that added together give a triangular number (2850 = T₇₅).

The spelling of 16381212 in words is "sixteen million, three hundred eighty-one thousand, two hundred twelve".