225161635 has 4 divisors (see below), whose sum is σ = 270193968. Its totient is φ = 180129304.

The previous prime is 225161633. The next prime is 225161669. The reversal of 225161635 is 536161522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 225161635 - 2¹ = 225161633 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 225161597 and 225161606.

It is not an unprimeable number, because it can be changed into a prime (225161633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22516159 + ... + 22516168.

It is an arithmetic number, because the mean of its divisors is an integer number (67548492).

Almost surely, 2^225161635 is an apocalyptic number.

225161635 is a deficient number, since it is larger than the sum of its proper divisors (45032333).

225161635 is an equidigital number, since it uses as much as digits as its factorization.

225161635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45032332.

The product of its digits is 10800, while the sum is 31.

The square root of 225161635 is about 15005.3868660558. The cubic root of 225161635 is about 608.3658086539.

The spelling of 225161635 in words is "two hundred twenty-five million, one hundred sixty-one thousand, six hundred thirty-five".