22041621 has 36 divisors (see below), whose sum is σ = 37393824. Its totient is φ = 12474000.

The previous prime is 22041583. The next prime is 22041623. The reversal of 22041621 is 12614022.

22041621 is a `hidden beast` number, since 2 + 2 + 0 + 41 + 621 = 666.

22041621 is nontrivially palindromic in base 2 and base 4.

It is not a de Polignac number, because 22041621 - 2²¹ = 19944469 is a prime.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 22041594 and 22041603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22041623) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 66426 + ... + 66756.

Almost surely, 2^22041621 is an apocalyptic number.

22041621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22041621 is a deficient number, since it is larger than the sum of its proper divisors (15352203).

22041621 is a wasteful number, since it uses less digits than its factorization.

22041621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 22041621 is about 4694.8504768523. The cubic root of 22041621 is about 280.3805242940.

Adding to 22041621 its reverse (12614022), we get a palindrome (34655643).

The spelling of 22041621 in words is "twenty-two million, forty-one thousand, six hundred twenty-one".