225785905 has 8 divisors (see below), whose sum is σ = 277244352. Its totient is φ = 176427888.

The previous prime is 225785887. The next prime is 225785953. The reversal of 225785905 is 509587522.

225785905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225785905 - 2⁹ = 225785393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian 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, 524869 + ... + 525298.

It is an arithmetic number, because the mean of its divisors is an integer number (34655544).

Almost surely, 2^225785905 is an apocalyptic number.

It is an amenable number.

225785905 is a deficient number, since it is larger than the sum of its proper divisors (51458447).

225785905 is a wasteful number, since it uses less digits than its factorization.

225785905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050215.

The product of its (nonzero) digits is 252000, while the sum is 43.

The square root of 225785905 is about 15026.1739973953. The cubic root of 225785905 is about 608.9275296794.

The spelling of 225785905 in words is "two hundred twenty-five million, seven hundred eighty-five thousand, nine hundred five".