2228261 has 4 divisors (see below), whose sum is σ = 2546592. Its totient is φ = 1909932.

The previous prime is 2228243. The next prime is 2228299. The reversal of 2228261 is 1628222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2228261 is a prime.

It is a d-powerful number, because it can be written as 2¹⁵ + 2¹⁶ + 2²⁰ + 8⁵ + 2²⁰ + 6² + 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 (2228201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159155 + ... + 159168.

It is an arithmetic number, because the mean of its divisors is an integer number (636648).

2^2228261 is an apocalyptic number.

It is an amenable number.

2228261 is a deficient number, since it is larger than the sum of its proper divisors (318331).

2228261 is an equidigital number, since it uses as much as digits as its factorization.

2228261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318330.

The product of its digits is 768, while the sum is 23.

The square root of 2228261 is about 1492.7360784814. The cubic root of 2228261 is about 130.6136862068.

The spelling of 2228261 in words is "two million, two hundred twenty-eight thousand, two hundred sixty-one".