225515805 has 32 divisors (see below), whose sum is σ = 379551744. Its totient is φ = 114117696.

The previous prime is 225515791. The next prime is 225515813. The reversal of 225515805 is 508515522.

225515805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 225515805 - 2⁷ = 225515677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41242 + ... + 46388.

It is an arithmetic number, because the mean of its divisors is an integer number (11860992).

Almost surely, 2^225515805 is an apocalyptic number.

It is an amenable number.

225515805 is a deficient number, since it is larger than the sum of its proper divisors (154035939).

225515805 is a wasteful number, since it uses less digits than its factorization.

225515805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5305.

The product of its (nonzero) digits is 20000, while the sum is 33.

The square root of 225515805 is about 15017.1836573973. The cubic root of 225515805 is about 608.6846196932.

The spelling of 225515805 in words is "two hundred twenty-five million, five hundred fifteen thousand, eight hundred five".