21227382 has 24 divisors (see below), whose sum is σ = 50174280. Its totient is φ = 6432480.

The previous prime is 21227377. The next prime is 21227387. The reversal of 21227382 is 28372212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21227377) and next prime (21227387).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21227387) 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, 53407 + ... + 53802.

It is an arithmetic number, because the mean of its divisors is an integer number (2090595).

Almost surely, 2^21227382 is an apocalyptic number.

21227382 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21227382 is an abundant number, since it is smaller than the sum of its proper divisors (28946898).

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

21227382 is a wasteful number, since it uses less digits than its factorization.

21227382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107228 (or 107225 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 21227382 is about 4607.3183089515. The cubic root of 21227382 is about 276.8846065861.

Adding to 21227382 its reverse (28372212), we get a palindrome (49599594).

It can be divided in two parts, 21227 and 382, that added together give a square (21609 = 147²).

The spelling of 21227382 in words is "twenty-one million, two hundred twenty-seven thousand, three hundred eighty-two".