21232244 has 24 divisors (see below), whose sum is σ = 40678848. Its totient is φ = 9616640.

The previous prime is 21232229. The next prime is 21232247. The reversal of 21232244 is 44223212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14849 + ... + 16215.

It is an arithmetic number, because the mean of its divisors is an integer number (1694952).

Almost surely, 2^21232244 is an apocalyptic number.

It is an amenable number.

21232244 is a deficient number, since it is larger than the sum of its proper divisors (19446604).

21232244 is a wasteful number, since it uses less digits than its factorization.

21232244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735 (or 1733 counting only the distinct ones).

The product of its digits is 768, while the sum is 20.

The square root of 21232244 is about 4607.8459175628. The cubic root of 21232244 is about 276.9057445388.

Adding to 21232244 its reverse (44223212), we get a palindrome (65455456).

The spelling of 21232244 in words is "twenty-one million, two hundred thirty-two thousand, two hundred forty-four".