225040891 has 4 divisors (see below), whose sum is σ = 225095472. Its totient is φ = 224986312.

The previous prime is 225040877. The next prime is 225040903. The reversal of 225040891 is 198040522.

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 225040891 - 2⁵ = 225040859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225040391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20551 + ... + 29536.

It is an arithmetic number, because the mean of its divisors is an integer number (56273868).

Almost surely, 2^225040891 is an apocalyptic number.

225040891 is a deficient number, since it is larger than the sum of its proper divisors (54581).

225040891 is an equidigital number, since it uses as much as digits as its factorization.

225040891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54580.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 225040891 is about 15001.3629714103. The cubic root of 225040891 is about 608.2570428546.

The spelling of 225040891 in words is "two hundred twenty-five million, forty thousand, eight hundred ninety-one".