22225442 has 4 divisors (see below), whose sum is σ = 33338166. Its totient is φ = 11112720.

The previous prime is 22225439. The next prime is 22225447. The reversal of 22225442 is 24452222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 22005481 + 219961 = 4691^2 + 469^2 .

It is not an unprimeable number, because it can be changed into a prime (22225447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556359 + ... + 5556362.

Almost surely, 2^22225442 is an apocalyptic number.

22225442 is a deficient number, since it is larger than the sum of its proper divisors (11112724).

22225442 is a wasteful number, since it uses less digits than its factorization.

22225442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11112723.

The product of its digits is 2560, while the sum is 23.

The square root of 22225442 is about 4714.3867045460. The cubic root of 22225442 is about 281.1577994403.

Adding to 22225442 its reverse (24452222), we get a palindrome (46677664).

The spelling of 22225442 in words is "twenty-two million, two hundred twenty-five thousand, four hundred forty-two".