225523885 has 4 divisors (see below), whose sum is σ = 270628668. Its totient is φ = 180419104.

The previous prime is 225523877. The next prime is 225523889. The reversal of 225523885 is 588325522.

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

It can be written as a sum of positive squares in 2 ways, for example, as 180123241 + 45400644 = 13421^2 + 6738^2 .

It is a cyclic number.

It is not a de Polignac number, because 225523885 - 2³ = 225523877 is a prime.

It is a super-2 number, since 2×225523885² = 101722045410986450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (225523889) 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, 22552384 + ... + 22552393.

It is an arithmetic number, because the mean of its divisors is an integer number (67657167).

Almost surely, 2^225523885 is an apocalyptic number.

It is an amenable number.

225523885 is a deficient number, since it is larger than the sum of its proper divisors (45104783).

225523885 is an equidigital number, since it uses as much as digits as its factorization.

225523885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45104782.

The product of its digits is 192000, while the sum is 40.

The square root of 225523885 is about 15017.4526801319. The cubic root of 225523885 is about 608.6918891216.

The spelling of 225523885 in words is "two hundred twenty-five million, five hundred twenty-three thousand, eight hundred eighty-five".