22251442 has 8 divisors (see below), whose sum is σ = 34828416. Its totient is φ = 10641972.

The previous prime is 22251421. The next prime is 22251473. The reversal of 22251442 is 24415222.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 241818 + ... + 241909.

It is an arithmetic number, because the mean of its divisors is an integer number (4353552).

Almost surely, 2^22251442 is an apocalyptic number.

22251442 is a deficient number, since it is larger than the sum of its proper divisors (12576974).

22251442 is a wasteful number, since it uses less digits than its factorization.

22251442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483752.

The product of its digits is 1280, while the sum is 22.

The square root of 22251442 is about 4717.1434152461. The cubic root of 22251442 is about 281.2673923730.

Adding to 22251442 its reverse (24415222), we get a palindrome (46666664).

It can be divided in two parts, 2 and 2251442, that multiplied together give a square (4502884 = 2122²).

The spelling of 22251442 in words is "twenty-two million, two hundred fifty-one thousand, four hundred forty-two".