22281969 has 4 divisors (see below), whose sum is σ = 29709296. Its totient is φ = 14854644.

The previous prime is 22281943. The next prime is 22281977. The reversal of 22281969 is 96918222.

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.

It is not a de Polignac number, because 22281969 - 2¹¹ = 22279921 is a prime.

It is a super-2 number, since 2×22281969² = 992972285033922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22281979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3713659 + ... + 3713664.

It is an arithmetic number, because the mean of its divisors is an integer number (7427324).

Almost surely, 2^22281969 is an apocalyptic number.

It is an amenable number.

22281969 is a deficient number, since it is larger than the sum of its proper divisors (7427327).

22281969 is an equidigital number, since it uses as much as digits as its factorization.

22281969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7427326.

The product of its digits is 31104, while the sum is 39.

The square root of 22281969 is about 4720.3780568933. The cubic root of 22281969 is about 281.3959582154.

The spelling of 22281969 in words is "twenty-two million, two hundred eighty-one thousand, nine hundred sixty-nine".