225783891 has 6 divisors (see below), whose sum is σ = 326132300. Its totient is φ = 150522588.

The previous prime is 225783853. The next prime is 225783907. The reversal of 225783891 is 198387522.

It is a happy number.

225783891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 225783891 - 2⁶ = 225783827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225783091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12543541 + ... + 12543558.

Almost surely, 2^225783891 is an apocalyptic number.

225783891 is a deficient number, since it is larger than the sum of its proper divisors (100348409).

225783891 is a wasteful number, since it uses less digits than its factorization.

225783891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25087105 (or 25087102 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 225783891 is about 15026.1069808517. The cubic root of 225783891 is about 608.9257191387.

The spelling of 225783891 in words is "two hundred twenty-five million, seven hundred eighty-three thousand, eight hundred ninety-one".