22140425 has 12 divisors (see below), whose sum is σ = 27521676. Its totient is φ = 17668800.

The previous prime is 22140383. The next prime is 22140439. The reversal of 22140425 is 52404122.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 5067001 + 17073424 = 2251^2 + 4132^2 .

It is not a de Polignac number, because 22140425 - 2⁶ = 22140361 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22140397 and 22140406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12707 + ... + 14343.

It is an arithmetic number, because the mean of its divisors is an integer number (2293473).

Almost surely, 2^22140425 is an apocalyptic number.

22140425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22140425 is a deficient number, since it is larger than the sum of its proper divisors (5381251).

22140425 is a wasteful number, since it uses less digits than its factorization.

22140425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188 (or 2183 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 22140425 is about 4705.3613038745. The cubic root of 22140425 is about 280.7988454118.

Adding to 22140425 its reverse (52404122), we get a palindrome (74544547).

The spelling of 22140425 in words is "twenty-two million, one hundred forty thousand, four hundred twenty-five".