21227332 has 24 divisors (see below), whose sum is σ = 44690240. Its totient is φ = 8618400.

The previous prime is 21227317. The next prime is 21227357. The reversal of 21227332 is 23372212.

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, 19419 + ... + 20482.

Almost surely, 2^21227332 is an apocalyptic number.

It is an amenable number.

21227332 is an abundant number, since it is smaller than the sum of its proper divisors (23462908).

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

21227332 is a wasteful number, since it uses less digits than its factorization.

21227332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39931 (or 39929 counting only the distinct ones).

The product of its digits is 1008, while the sum is 22.

The square root of 21227332 is about 4607.3128827984. The cubic root of 21227332 is about 276.8843891902.

Adding to 21227332 its reverse (23372212), we get a palindrome (44599544).

The spelling of 21227332 in words is "twenty-one million, two hundred twenty-seven thousand, three hundred thirty-two".