22500221 has 8 divisors (see below), whose sum is σ = 22982400. Its totient is φ = 22023232.

The previous prime is 22500211. The next prime is 22500229. The reversal of 22500221 is 12200522.

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

It is a cyclic number.

It is not a de Polignac number, because 22500221 - 2⁶ = 22500157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22500196 and 22500205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22500229) 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, 8180 + ... + 10578.

It is an arithmetic number, because the mean of its divisors is an integer number (2872800).

Almost surely, 2^22500221 is an apocalyptic number.

It is an amenable number.

22500221 is a deficient number, since it is larger than the sum of its proper divisors (482179).

22500221 is a wasteful number, since it uses less digits than its factorization.

22500221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2595.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 22500221 is about 4743.4397856408. The cubic root of 22500221 is about 282.3117329678.

Adding to 22500221 its reverse (12200522), we get a palindrome (34700743).

The spelling of 22500221 in words is "twenty-two million, five hundred thousand, two hundred twenty-one".