22221275 has 12 divisors (see below), whose sum is σ = 28300272. Its totient is φ = 17295840.

The previous prime is 22221259. The next prime is 22221299. The reversal of 22221275 is 57212222.

It is not a de Polignac number, because 22221275 - 2⁴ = 22221259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22221275.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 11087 + ... + 12936.

It is an arithmetic number, because the mean of its divisors is an integer number (2358356).

Almost surely, 2^22221275 is an apocalyptic number.

22221275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

22221275 is a deficient number, since it is larger than the sum of its proper divisors (6078997).

22221275 is a wasteful number, since it uses less digits than its factorization.

22221275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24070 (or 24065 counting only the distinct ones).

The product of its digits is 1120, while the sum is 23.

The square root of 22221275 is about 4713.9447387512. The cubic root of 22221275 is about 281.1402271197.

Adding to 22221275 its reverse (57212222), we get a palindrome (79433497).

The spelling of 22221275 in words is "twenty-two million, two hundred twenty-one thousand, two hundred seventy-five".