16215232 has 56 divisors (see below), whose sum is σ = 36283392. Its totient is φ = 7123200.

The previous prime is 16215217. The next prime is 16215239. The reversal of 16215232 is 23251261.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (16215239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21453 + ... + 22195.

Almost surely, 2^16215232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16215232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18141696).

16215232 is an abundant number, since it is smaller than the sum of its proper divisors (20068160).

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

16215232 is a wasteful number, since it uses less digits than its factorization.

16215232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797 (or 787 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 16215232 is about 4026.8141253353. The cubic root of 16215232 is about 253.1090782446.

Adding to 16215232 its reverse (23251261), we get a palindrome (39466493).

The spelling of 16215232 in words is "sixteen million, two hundred fifteen thousand, two hundred thirty-two".