21241622 has 4 divisors (see below), whose sum is σ = 31862436. Its totient is φ = 10620810.

The previous prime is 21241573. The next prime is 21241631. The reversal of 21241622 is 22614212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21241594 and 21241603.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5310404 + ... + 5310407.

It is an arithmetic number, because the mean of its divisors is an integer number (7965609).

Almost surely, 2^21241622 is an apocalyptic number.

21241622 is a deficient number, since it is larger than the sum of its proper divisors (10620814).

21241622 is a wasteful number, since it uses less digits than its factorization.

21241622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10620813.

The product of its digits is 384, while the sum is 20.

The square root of 21241622 is about 4608.8634173731. The cubic root of 21241622 is about 276.9465070671.

Adding to 21241622 its reverse (22614212), we get a palindrome (43855834).

The spelling of 21241622 in words is "twenty-one million, two hundred forty-one thousand, six hundred twenty-two".