225205450 has 12 divisors (see below), whose sum is σ = 418882230. Its totient is φ = 90082160.

The previous prime is 225205441. The next prime is 225205493. The reversal of 225205450 is 54502522.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 219602761 + 5602689 = 14819^2 + 2367^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 2252005 + ... + 2252104.

Almost surely, 2^225205450 is an apocalyptic number.

225205450 is a deficient number, since it is larger than the sum of its proper divisors (193676780).

225205450 is a wasteful number, since it uses less digits than its factorization.

225205450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4504121 (or 4504116 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 225205450 is about 15006.8467707244. The cubic root of 225205450 is about 608.4052674470.

Adding to 225205450 its reverse (54502522), we get a palindrome (279707972).

The spelling of 225205450 in words is "two hundred twenty-five million, two hundred five thousand, four hundred fifty".