2226661 has 4 divisors (see below), whose sum is σ = 2243052. Its totient is φ = 2210272.

The previous prime is 2226659. The next prime is 2226673. The reversal of 2226661 is 1666222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1425636 + 801025 = 1194^2 + 895^2 .

It is a cyclic number.

It is not a de Polignac number, because 2226661 - 2¹ = 2226659 is a prime.

It is a Duffinian number.

2226661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2226461) 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, 7990 + ... + 8263.

It is an arithmetic number, because the mean of its divisors is an integer number (560763).

2^2226661 is an apocalyptic number.

It is an amenable number.

2226661 is a deficient number, since it is larger than the sum of its proper divisors (16391).

2226661 is a wasteful number, since it uses less digits than its factorization.

2226661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16390.

The product of its digits is 1728, while the sum is 25.

The square root of 2226661 is about 1492.2000536121. The cubic root of 2226661 is about 130.5824163903.

The spelling of 2226661 in words is "two million, two hundred twenty-six thousand, six hundred sixty-one".