21334522 has 24 divisors (see below), whose sum is σ = 35750880. Its totient is φ = 9469560.

The previous prime is 21334499. The next prime is 21334559. The reversal of 21334522 is 22543312.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 21334493 and 21334502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48379 + ... + 48817.

It is an arithmetic number, because the mean of its divisors is an integer number (1489620).

Almost surely, 2^21334522 is an apocalyptic number.

21334522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21334522 is a deficient number, since it is larger than the sum of its proper divisors (14416358).

21334522 is a wasteful number, since it uses less digits than its factorization.

21334522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546 (or 499 counting only the distinct ones).

The product of its digits is 1440, while the sum is 22.

The square root of 21334522 is about 4618.9308286659. The cubic root of 21334522 is about 277.3496607411.

Adding to 21334522 its reverse (22543312), we get a palindrome (43877834).

The spelling of 21334522 in words is "twenty-one million, three hundred thirty-four thousand, five hundred twenty-two".