201445225 has 6 divisors (see below), whose sum is σ = 249792110. Its totient is φ = 161156160.

The previous prime is 201445219. The next prime is 201445229. The reversal of 201445225 is 522544102.

It can be written as a sum of positive squares in 3 ways, for example, as 2663424 + 198781801 = 1632^2 + 14099^2 .

It is not a de Polignac number, because 201445225 - 2⁵ = 201445193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 8057809 = 201445225 / (2 + 0 + 1 + 4 + 4 + 5 + 2 + 2 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 201445225.

It is not an unprimeable number, because it can be changed into a prime (201445229) 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, 4028880 + ... + 4028929.

Almost surely, 2^201445225 is an apocalyptic number.

201445225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

201445225 is a deficient number, since it is larger than the sum of its proper divisors (48346885).

201445225 is an equidigital number, since it uses as much as digits as its factorization.

201445225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8057819 (or 8057814 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 201445225 is about 14193.1400683570. The cubic root of 201445225 is about 586.2087894194.

Adding to 201445225 its reverse (522544102), we get a palindrome (723989327).

The spelling of 201445225 in words is "two hundred one million, four hundred forty-five thousand, two hundred twenty-five".