22531442 has 4 divisors (see below), whose sum is σ = 33797166. Its totient is φ = 11265720.

The previous prime is 22531433. The next prime is 22531489. The reversal of 22531442 is 24413522.

It is a happy number.

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., 21893041 + 638401 = 4679^2 + 799^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5632859 + ... + 5632862.

Almost surely, 2^22531442 is an apocalyptic number.

22531442 is a deficient number, since it is larger than the sum of its proper divisors (11265724).

22531442 is a wasteful number, since it uses less digits than its factorization.

22531442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11265723.

The product of its digits is 1920, while the sum is 23.

The square root of 22531442 is about 4746.7296110059. The cubic root of 22531442 is about 282.4422499229.

Adding to 22531442 its reverse (24413522), we get a palindrome (46944964).

The spelling of 22531442 in words is "twenty-two million, five hundred thirty-one thousand, four hundred forty-two".