27321216 has 96 divisors (see below), whose sum is σ = 78770520. Its totient is φ = 8386560.

The previous prime is 27321209. The next prime is 27321223. The reversal of 27321216 is 61212372.

It is an interprime number because it is at equal distance from previous prime (27321209) and next prime (27321223).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64686 + ... + 65106.

Almost surely, 2^27321216 is an apocalyptic number.

27321216 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27321216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39385260).

27321216 is an abundant number, since it is smaller than the sum of its proper divisors (51449304).

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

27321216 is a wasteful number, since it uses less digits than its factorization.

27321216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464 (or 439 counting only the distinct ones).

The product of its digits is 1008, while the sum is 24.

The square root of 27321216 is about 5226.9700592217. The cubic root of 27321216 is about 301.1850019604.

Adding to 27321216 its reverse (61212372), we get a palindrome (88533588).

The spelling of 27321216 in words is "twenty-seven million, three hundred twenty-one thousand, two hundred sixteen".