225645578 has 16 divisors (see below), whose sum is σ = 350947080. Its totient is φ = 108681216.

The previous prime is 225645551. The next prime is 225645611. The reversal of 225645578 is 875546522.

It can be written as a sum of positive squares in 4 ways, for example, as 221206129 + 4439449 = 14873^2 + 2107^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22250 + ... + 30762.

Almost surely, 2^225645578 is an apocalyptic number.

225645578 is a deficient number, since it is larger than the sum of its proper divisors (125301502).

225645578 is a wasteful number, since it uses less digits than its factorization.

225645578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9001.

The product of its digits is 672000, while the sum is 44.

The square root of 225645578 is about 15021.5038528105. The cubic root of 225645578 is about 608.8013530965.

The spelling of 225645578 in words is "two hundred twenty-five million, six hundred forty-five thousand, five hundred seventy-eight".