22514221 has 4 divisors (see below), whose sum is σ = 23699200. Its totient is φ = 21329244.

The previous prime is 22514201. The next prime is 22514227. The reversal of 22514221 is 12241522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12241522 = 2 ⋅6120761.

It is a cyclic number.

It is not a de Polignac number, because 22514221 - 2⁵ = 22514189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 1184959 = 22514221 / (2 + 2 + 5 + 1 + 4 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22514227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592461 + ... + 592498.

It is an arithmetic number, because the mean of its divisors is an integer number (5924800).

Almost surely, 2^22514221 is an apocalyptic number.

It is an amenable number.

22514221 is a deficient number, since it is larger than the sum of its proper divisors (1184979).

22514221 is a wasteful number, since it uses less digits than its factorization.

22514221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184978.

The product of its digits is 320, while the sum is 19.

The square root of 22514221 is about 4744.9152784850. The cubic root of 22514221 is about 282.3702737973.

Adding to 22514221 its reverse (12241522), we get a palindrome (34755743).

The spelling of 22514221 in words is "twenty-two million, five hundred fourteen thousand, two hundred twenty-one".