225976505 has 4 divisors (see below), whose sum is σ = 271171812. Its totient is φ = 180781200.

The previous prime is 225976489. The next prime is 225976523. The reversal of 225976505 is 505679522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 102677689 + 123298816 = 10133^2 + 11104^2 .

It is not a de Polignac number, because 225976505 - 2⁴ = 225976489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 22597646 + ... + 22597655.

It is an arithmetic number, because the mean of its divisors is an integer number (67792953).

Almost surely, 2^225976505 is an apocalyptic number.

It is an amenable number.

225976505 is a deficient number, since it is larger than the sum of its proper divisors (45195307).

225976505 is an equidigital number, since it uses as much as digits as its factorization.

225976505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45195306.

The product of its (nonzero) digits is 189000, while the sum is 41.

The square root of 225976505 is about 15032.5149259863. The cubic root of 225976505 is about 609.0988260884.

The spelling of 225976505 in words is "two hundred twenty-five million, nine hundred seventy-six thousand, five hundred five".