2228091 has 4 divisors (see below), whose sum is σ = 2970792. Its totient is φ = 1485392.

The previous prime is 2228089. The next prime is 2228101. The reversal of 2228091 is 1908222.

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 2228091 - 2¹ = 2228089 is a prime.

It is a super-3 number, since 3×2228091³ = 33183334724948872713, which contains 333 as substring.

It is a D-number.

2228091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2228011) 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, 371346 + ... + 371351.

It is an arithmetic number, because the mean of its divisors is an integer number (742698).

2^2228091 is an apocalyptic number.

2228091 is a deficient number, since it is larger than the sum of its proper divisors (742701).

2228091 is an equidigital number, since it uses as much as digits as its factorization.

2228091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742700.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 2228091 is about 1492.6791349784. The cubic root of 2228091 is about 130.6103644996.

The spelling of 2228091 in words is "two million, two hundred twenty-eight thousand, ninety-one".