21344522 has 16 divisors (see below), whose sum is σ = 33242400. Its totient is φ = 10266480.

The previous prime is 21344513. The next prime is 21344593. The reversal of 21344522 is 22544312.

It is a happy number.

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, 21497 + ... + 22467.

It is an arithmetic number, because the mean of its divisors is an integer number (2077650).

Almost surely, 2^21344522 is an apocalyptic number.

21344522 is a deficient number, since it is larger than the sum of its proper divisors (11897878).

21344522 is a wasteful number, since it uses less digits than its factorization.

21344522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381.

The product of its digits is 1920, while the sum is 23.

The square root of 21344522 is about 4620.0132034443. The cubic root of 21344522 is about 277.3929874423.

Adding to 21344522 its reverse (22544312), we get a palindrome (43888834).

The spelling of 21344522 in words is "twenty-one million, three hundred forty-four thousand, five hundred twenty-two".