22520425 has 6 divisors (see below), whose sum is σ = 27925358. Its totient is φ = 18016320.

The previous prime is 22520423. The next prime is 22520431. The reversal of 22520425 is 52402522.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 345744 + 22174681 = 588^2 + 4709^2 .

It is not a de Polignac number, because 22520425 - 2¹ = 22520423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22520396 and 22520405.

It is not an unprimeable number, because it can be changed into a prime (22520423) 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 5 ways as a sum of consecutive naturals, for example, 450384 + ... + 450433.

Almost surely, 2^22520425 is an apocalyptic number.

22520425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22520425 is a deficient number, since it is larger than the sum of its proper divisors (5404933).

22520425 is an equidigital number, since it uses as much as digits as its factorization.

22520425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900827 (or 900822 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 22520425 is about 4745.5689859067. The cubic root of 22520425 is about 282.3962079878.

Adding to 22520425 its reverse (52402522), we get a palindrome (74922947).

The spelling of 22520425 in words is "twenty-two million, five hundred twenty thousand, four hundred twenty-five".