22230621 has 12 divisors (see below), whose sum is σ = 36698272. Its totient is φ = 12703176.

The previous prime is 22230619. The next prime is 22230623. The reversal of 22230621 is 12603222.

22230621 is a `hidden beast` number, since 22 + 23 + 0 + 621 = 666.

It is an interprime number because it is at equal distance from previous prime (22230619) and next prime (22230623).

It is not a de Polignac number, because 22230621 - 2¹ = 22230619 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22230594 and 22230603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22230623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 176371 + ... + 176496.

Almost surely, 2^22230621 is an apocalyptic number.

22230621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22230621 is a deficient number, since it is larger than the sum of its proper divisors (14467651).

22230621 is a wasteful number, since it uses less digits than its factorization.

22230621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352880 (or 352877 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 22230621 is about 4714.9359486636. The cubic root of 22230621 is about 281.1796363237.

Adding to 22230621 its reverse (12603222), we get a palindrome (34833843).

The spelling of 22230621 in words is "twenty-two million, two hundred thirty thousand, six hundred twenty-one".