22512025 has 6 divisors (see below), whose sum is σ = 27914942. Its totient is φ = 18009600.

The previous prime is 22512019. The next prime is 22512047. The reversal of 22512025 is 52021522.

It can be written as a sum of positive squares in 3 ways, for example, as 1617984 + 20894041 = 1272^2 + 4571^2 .

It is not a de Polignac number, because 22512025 - 2⁷ = 22511897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22511993 and 22512011.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 450216 + ... + 450265.

Almost surely, 2^22512025 is an apocalyptic number.

22512025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22512025 is a deficient number, since it is larger than the sum of its proper divisors (5402917).

22512025 is an equidigital number, since it uses as much as digits as its factorization.

22512025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900491 (or 900486 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 22512025 is about 4744.6838672350. The cubic root of 22512025 is about 282.3610928551.

Adding to 22512025 its reverse (52021522), we get a palindrome (74533547).

The spelling of 22512025 in words is "twenty-two million, five hundred twelve thousand, twenty-five".