22140506 has 8 divisors (see below), whose sum is σ = 33434100. Its totient is φ = 10995808.

The previous prime is 22140493. The next prime is 22140509. The reversal of 22140506 is 60504122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 22137025 + 3481 = 4705^2 + 59^2 .

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 (22140509) by changing a digit.

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, 36851 + ... + 37446.

Almost surely, 2^22140506 is an apocalyptic number.

22140506 is a deficient number, since it is larger than the sum of its proper divisors (11293594).

22140506 is a wasteful number, since it uses less digits than its factorization.

22140506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74448.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 22140506 is about 4705.3699110697. The cubic root of 22140506 is about 280.7991878424.

Adding to 22140506 its reverse (60504122), we get a palindrome (82644628).

The spelling of 22140506 in words is "twenty-two million, one hundred forty thousand, five hundred six".