21325282 has 16 divisors (see below), whose sum is σ = 35188704. Its totient is φ = 9692100.

The previous prime is 21325279. The next prime is 21325307. The reversal of 21325282 is 28252312.

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, 1344 + ... + 6667.

It is an arithmetic number, because the mean of its divisors is an integer number (2199294).

Almost surely, 2^21325282 is an apocalyptic number.

21325282 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21325282 is a deficient number, since it is larger than the sum of its proper divisors (13863422).

21325282 is an equidigital number, since it uses as much as digits as its factorization.

21325282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8046 (or 8024 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 21325282 is about 4617.9304888662. The cubic root of 21325282 is about 277.3096148329.

Adding to 21325282 its reverse (28252312), we get a palindrome (49577594).

The spelling of 21325282 in words is "twenty-one million, three hundred twenty-five thousand, two hundred eighty-two".