225805816 has 32 divisors (see below), whose sum is σ = 433414800. Its totient is φ = 110260480.

The previous prime is 225805793. The next prime is 225805841. The reversal of 225805816 is 618508522.

It is a congruent number.

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, 57186 + ... + 61006.

Almost surely, 2^225805816 is an apocalyptic number.

It is an amenable number.

225805816 is a deficient number, since it is larger than the sum of its proper divisors (207608984).

225805816 is a wasteful number, since it uses less digits than its factorization.

225805816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3999 (or 3995 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 225805816 is about 15026.8365266945. The cubic root of 225805816 is about 608.9454286409.

The spelling of 225805816 in words is "two hundred twenty-five million, eight hundred five thousand, eight hundred sixteen".