2251445225 has 6 divisors (see below), whose sum is σ = 2791792110. Its totient is φ = 1801156160.

The previous prime is 2251445221. The next prime is 2251445233. The reversal of 2251445225 is 5225441522.

It can be written as a sum of positive squares in 3 ways, for example, as 528448144 + 1722997081 = 22988^2 + 41509^2 .

It is not a de Polignac number, because 2251445225 - 2² = 2251445221 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2251445191 and 2251445200.

It is not an unprimeable number, because it can be changed into a prime (2251445221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45028880 + ... + 45028929.

It is an arithmetic number, because the mean of its divisors is an integer number (465298685).

Almost surely, 2^2251445225 is an apocalyptic number.

2251445225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2251445225 is a deficient number, since it is larger than the sum of its proper divisors (540346885).

2251445225 is an equidigital number, since it uses as much as digits as its factorization.

2251445225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90057819 (or 90057814 counting only the distinct ones).

The product of its digits is 32000, while the sum is 32.

The square root of 2251445225 is about 47449.3964661301. The cubic root of 2251445225 is about 1310.6511971286.

Adding to 2251445225 its reverse (5225441522), we get a palindrome (7476886747).

The spelling of 2251445225 in words is "two billion, two hundred fifty-one million, four hundred forty-five thousand, two hundred twenty-five".