445220225 has 24 divisors (see below), whose sum is σ = 586268280. Its totient is φ = 334238720.

The previous prime is 445220219. The next prime is 445220227. The reversal of 445220225 is 522022544.

It can be written as a sum of positive squares in 12 ways, for example, as 130051216 + 315169009 = 11404^2 + 17753^2 .

It is not a de Polignac number, because 445220225 - 2⁸ = 445219969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 445220194 and 445220203.

It is not an unprimeable number, because it can be changed into a prime (445220227) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 163979 + ... + 166671.

It is an arithmetic number, because the mean of its divisors is an integer number (24427845).

Almost surely, 2^445220225 is an apocalyptic number.

It is an amenable number.

445220225 is a deficient number, since it is larger than the sum of its proper divisors (141048055).

445220225 is a wasteful number, since it uses less digits than its factorization.

445220225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3109 (or 3104 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 445220225 is about 21100.2422971870. The cubic root of 445220225 is about 763.5865937960.

Adding to 445220225 its reverse (522022544), we get a palindrome (967242769).

The spelling of 445220225 in words is "four hundred forty-five million, two hundred twenty thousand, two hundred twenty-five".