21122382 has 32 divisors (see below), whose sum is σ = 43973280. Its totient is φ = 6755840.

The previous prime is 21122363. The next prime is 21122383. The reversal of 21122382 is 28322112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40282 + ... + 40802.

It is an arithmetic number, because the mean of its divisors is an integer number (1374165).

Almost surely, 2^21122382 is an apocalyptic number.

21122382 is an abundant number, since it is smaller than the sum of its proper divisors (22850898).

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

21122382 is a wasteful number, since it uses less digits than its factorization.

21122382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788.

The product of its digits is 384, while the sum is 21.

The square root of 21122382 is about 4595.9092680339. The cubic root of 21122382 is about 276.4273206205.

Adding to 21122382 its reverse (28322112), we get a palindrome (49444494).

The spelling of 21122382 in words is "twenty-one million, one hundred twenty-two thousand, three hundred eighty-two".