2229661 has 4 divisors (see below), whose sum is σ = 2548192. Its totient is φ = 1911132.

The previous prime is 2229659. The next prime is 2229673. The reversal of 2229661 is 1669222.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1669222 = 2 ⋅834611.

It is a cyclic number.

It is not a de Polignac number, because 2229661 - 2¹ = 2229659 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 (2229691) 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, 159255 + ... + 159268.

It is an arithmetic number, because the mean of its divisors is an integer number (637048).

2^2229661 is an apocalyptic number.

It is an amenable number.

2229661 is a deficient number, since it is larger than the sum of its proper divisors (318531).

2229661 is an equidigital number, since it uses as much as digits as its factorization.

2229661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318530.

The product of its digits is 2592, while the sum is 28.

The square root of 2229661 is about 1493.2049423974. The cubic root of 2229661 is about 130.6410350194.

The spelling of 2229661 in words is "two million, two hundred twenty-nine thousand, six hundred sixty-one".