2228791 has 4 divisors (see below), whose sum is σ = 2235232. Its totient is φ = 2222352.

The previous prime is 2228783. The next prime is 2228797. The reversal of 2228791 is 1978222.

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 2228791 - 2³ = 2228783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2228797) 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, 2670 + ... + 3403.

It is an arithmetic number, because the mean of its divisors is an integer number (558808).

2^2228791 is an apocalyptic number.

2228791 is a deficient number, since it is larger than the sum of its proper divisors (6441).

2228791 is an equidigital number, since it uses as much as digits as its factorization.

2228791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6440.

The product of its digits is 4032, while the sum is 31.

The square root of 2228791 is about 1492.9135942847. The cubic root of 2228791 is about 130.6240410329.

The spelling of 2228791 in words is "two million, two hundred twenty-eight thousand, seven hundred ninety-one".