225385291 has 4 divisors (see below), whose sum is σ = 227917800. Its totient is φ = 222852784.

The previous prime is 225385289. The next prime is 225385313. The reversal of 225385291 is 192583522.

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 225385291 - 2¹ = 225385289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 225385291.

It is not an unprimeable number, because it can be changed into a prime (225385591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1266121 + ... + 1266298.

It is an arithmetic number, because the mean of its divisors is an integer number (56979450).

Almost surely, 2^225385291 is an apocalyptic number.

225385291 is a deficient number, since it is larger than the sum of its proper divisors (2532509).

225385291 is an equidigital number, since it uses as much as digits as its factorization.

225385291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2532508.

The product of its digits is 43200, while the sum is 37.

The square root of 225385291 is about 15012.8375399190. The cubic root of 225385291 is about 608.5671745698.

The spelling of 225385291 in words is "two hundred twenty-five million, three hundred eighty-five thousand, two hundred ninety-one".