225631085 has 4 divisors (see below), whose sum is σ = 270757308. Its totient is φ = 180504864.

The previous prime is 225631073. The next prime is 225631093. The reversal of 225631085 is 580136522.

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 45346756 + 180284329 = 6734^2 + 13427^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225631085 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22563104 + ... + 22563113.

It is an arithmetic number, because the mean of its divisors is an integer number (67689327).

Almost surely, 2^225631085 is an apocalyptic number.

It is an amenable number.

225631085 is a deficient number, since it is larger than the sum of its proper divisors (45126223).

225631085 is an equidigital number, since it uses as much as digits as its factorization.

225631085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45126222.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 225631085 is about 15021.0214366401. The cubic root of 225631085 is about 608.7883185742.

The spelling of 225631085 in words is "two hundred twenty-five million, six hundred thirty-one thousand, eighty-five".