225636445 has 16 divisors (see below), whose sum is σ = 279963648. Its totient is φ = 174395520.

The previous prime is 225636421. The next prime is 225636451. The reversal of 225636445 is 544636522.

It is not a de Polignac number, because 225636445 - 2⁹ = 225635933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169372 + ... + 170698.

It is an arithmetic number, because the mean of its divisors is an integer number (17497728).

Almost surely, 2^225636445 is an apocalyptic number.

It is an amenable number.

225636445 is a deficient number, since it is larger than the sum of its proper divisors (54327203).

225636445 is a wasteful number, since it uses less digits than its factorization.

225636445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2460.

The product of its digits is 172800, while the sum is 37.

The square root of 225636445 is about 15021.1998522089. The cubic root of 225636445 is about 608.7931392450.

The spelling of 225636445 in words is "two hundred twenty-five million, six hundred thirty-six thousand, four hundred forty-five".