22230021 has 8 divisors (see below), whose sum is σ = 32334624. Its totient is φ = 13472720.

The previous prime is 22229993. The next prime is 22230023. The reversal of 22230021 is 12003222.

22230021 = 424² + 425² + ... + 522².

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22230021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22229979 and 22230006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22230023) 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, 336786 + ... + 336851.

It is an arithmetic number, because the mean of its divisors is an integer number (4041828).

Almost surely, 2^22230021 is an apocalyptic number.

It is an amenable number.

22230021 is a deficient number, since it is larger than the sum of its proper divisors (10104603).

22230021 is a wasteful number, since it uses less digits than its factorization.

22230021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673651.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 22230021 is about 4714.8723206467. The cubic root of 22230021 is about 281.1771066403.

Adding to 22230021 its reverse (12003222), we get a palindrome (34233243).

The spelling of 22230021 in words is "twenty-two million, two hundred thirty thousand, twenty-one".