2225891 has 4 divisors (see below), whose sum is σ = 2240784. Its totient is φ = 2211000.

The previous prime is 2225887. The next prime is 2225959. The reversal of 2225891 is 1985222.

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 2225891 - 2² = 2225887 is a prime.

It is a d-powerful number, because it can be written as 2⁵ + 2¹⁶ + 2²¹ + 5² + 8⁴ + 9⁵ + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2225851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7220 + ... + 7521.

It is an arithmetic number, because the mean of its divisors is an integer number (560196).

2^2225891 is an apocalyptic number.

2225891 is a deficient number, since it is larger than the sum of its proper divisors (14893).

2225891 is a wasteful number, since it uses less digits than its factorization.

2225891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14892.

The product of its digits is 2880, while the sum is 29.

The square root of 2225891 is about 1491.9420230022. The cubic root of 2225891 is about 130.5673624518.

The spelling of 2225891 in words is "two million, two hundred twenty-five thousand, eight hundred ninety-one".