21225614 has 8 divisors (see below), whose sum is σ = 31876248. Its totient is φ = 10600200.

The previous prime is 21225613. The next prime is 21225629. The reversal of 21225614 is 41652212.

It is a happy number.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21225614.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21225613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4037 + ... + 7664.

It is an arithmetic number, because the mean of its divisors is an integer number (3984531).

Almost surely, 2^21225614 is an apocalyptic number.

21225614 is a deficient number, since it is larger than the sum of its proper divisors (10650634).

21225614 is a wasteful number, since it uses less digits than its factorization.

21225614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12610.

The product of its digits is 960, while the sum is 23.

The square root of 21225614 is about 4607.1264362941. The cubic root of 21225614 is about 276.8769192576.

Adding to 21225614 its reverse (41652212), we get a palindrome (62877826).

The spelling of 21225614 in words is "twenty-one million, two hundred twenty-five thousand, six hundred fourteen".