22621621 has 8 divisors (see below), whose sum is σ = 24873984. Its totient is φ = 20401920.

The previous prime is 22621601. The next prime is 22621631. The reversal of 22621621 is 12612622.

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

It is not a de Polignac number, because 22621621 - 2¹¹ = 22619573 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22621592 and 22621601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22621601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6700 + ... + 9493.

It is an arithmetic number, because the mean of its divisors is an integer number (3109248).

Almost surely, 2^22621621 is an apocalyptic number.

It is an amenable number.

22621621 is a deficient number, since it is larger than the sum of its proper divisors (2252363).

22621621 is a wasteful number, since it uses less digits than its factorization.

22621621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16331.

The product of its digits is 576, while the sum is 22.

The square root of 22621621 is about 4756.2191917530. The cubic root of 22621621 is about 282.8185604208.

It can be divided in two parts, 2262 and 1621, that added together give a palindrome (3883).

The spelling of 22621621 in words is "twenty-two million, six hundred twenty-one thousand, six hundred twenty-one".