225181605 has 24 divisors (see below), whose sum is σ = 396025056. Its totient is φ = 109178080.

The previous prime is 225181589. The next prime is 225181637. The reversal of 225181605 is 506181522.

It is not a de Polignac number, because 225181605 - 2⁴ = 225181589 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60219 + ... + 63848.

It is an arithmetic number, because the mean of its divisors is an integer number (16501044).

Almost surely, 2^225181605 is an apocalyptic number.

It is an amenable number.

225181605 is a deficient number, since it is larger than the sum of its proper divisors (170843451).

225181605 is a wasteful number, since it uses less digits than its factorization.

225181605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124097 (or 124086 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 225181605 is about 15006.0522789973. The cubic root of 225181605 is about 608.3837938168.

The spelling of 225181605 in words is "two hundred twenty-five million, one hundred eighty-one thousand, six hundred five".