21104522 has 8 divisors (see below), whose sum is σ = 31704672. Its totient is φ = 10536300.

The previous prime is 21104507. The next prime is 21104527. The reversal of 21104522 is 22540112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21104522.

It is not an unprimeable number, because it can be changed into a prime (21104527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6254 + ... + 9017.

It is an arithmetic number, because the mean of its divisors is an integer number (3963084).

Almost surely, 2^21104522 is an apocalyptic number.

21104522 is a deficient number, since it is larger than the sum of its proper divisors (10600150).

21104522 is a wasteful number, since it uses less digits than its factorization.

21104522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15964.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 21104522 is about 4593.9658248620. The cubic root of 21104522 is about 276.3493877420.

Adding to 21104522 its reverse (22540112), we get a palindrome (43644634).

The spelling of 21104522 in words is "twenty-one million, one hundred four thousand, five hundred twenty-two".