22335621 has 48 divisors (see below), whose sum is σ = 39836160. Its totient is φ = 10977120.

The previous prime is 22335587. The next prime is 22335623. The reversal of 22335621 is 12653322.

It is not a de Polignac number, because 22335621 - 2⁶ = 22335557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22335591 and 22335600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22335623) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30360 + ... + 31086.

It is an arithmetic number, because the mean of its divisors is an integer number (829920).

Almost surely, 2^22335621 is an apocalyptic number.

22335621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22335621 is a deficient number, since it is larger than the sum of its proper divisors (17500539).

22335621 is a wasteful number, since it uses less digits than its factorization.

22335621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774 (or 767 counting only the distinct ones).

The product of its digits is 2160, while the sum is 24.

The square root of 22335621 is about 4726.0576594028. The cubic root of 22335621 is about 281.6216317870.

Adding to 22335621 its reverse (12653322), we get a palindrome (34988943).

The spelling of 22335621 in words is "twenty-two million, three hundred thirty-five thousand, six hundred twenty-one".