225445425 has 24 divisors (see below), whose sum is σ = 388945344. Its totient is φ = 115008960.

The previous prime is 225445399. The next prime is 225445453. The reversal of 225445425 is 524544522.

It is a de Polignac number, because none of the positive numbers 2^k-225445425 is a prime.

It is an unprimeable number.

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, 63622 + ... + 67071.

It is an arithmetic number, because the mean of its divisors is an integer number (16206056).

Almost surely, 2^225445425 is an apocalyptic number.

225445425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

225445425 is a deficient number, since it is larger than the sum of its proper divisors (163499919).

225445425 is a wasteful number, since it uses less digits than its factorization.

225445425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130729 (or 130724 counting only the distinct ones).

The product of its digits is 64000, while the sum is 33.

The square root of 225445425 is about 15014.8401589894. The cubic root of 225445425 is about 608.6212927484.

Adding to 225445425 its reverse (524544522), we get a palindrome (749989947).

The spelling of 225445425 in words is "two hundred twenty-five million, four hundred forty-five thousand, four hundred twenty-five".