22540242 has 32 divisors (see below), whose sum is σ = 46992960. Its totient is φ = 7201280.

The previous prime is 22540237. The next prime is 22540319. The reversal of 22540242 is 24204522.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13738 + ... + 15290.

It is an arithmetic number, because the mean of its divisors is an integer number (1468530).

Almost surely, 2^22540242 is an apocalyptic number.

22540242 is an abundant number, since it is smaller than the sum of its proper divisors (24452718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22540242 is a wasteful number, since it uses less digits than its factorization.

22540242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 22540242 is about 4747.6564745146. The cubic root of 22540242 is about 282.4790158533.

Adding to 22540242 its reverse (24204522), we get a palindrome (46744764).

The spelling of 22540242 in words is "twenty-two million, five hundred forty thousand, two hundred forty-two".