22140442 has 8 divisors (see below), whose sum is σ = 33983136. Its totient is φ = 10812732.

The previous prime is 22140439. The next prime is 22140449. The reversal of 22140442 is 24404122.

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

It is not an unprimeable number, because it can be changed into a prime (22140449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128638 + ... + 128809.

It is an arithmetic number, because the mean of its divisors is an integer number (4247892).

Almost surely, 2^22140442 is an apocalyptic number.

22140442 is a deficient number, since it is larger than the sum of its proper divisors (11842694).

22140442 is a wasteful number, since it uses less digits than its factorization.

22140442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257492.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 22140442 is about 4705.3631103242. The cubic root of 22140442 is about 280.7989172800.

Adding to 22140442 its reverse (24404122), we get a palindrome (46544564).

The spelling of 22140442 in words is "twenty-two million, one hundred forty thousand, four hundred forty-two".