2233661 has 4 divisors (see below), whose sum is σ = 2238912. Its totient is φ = 2228412.

The previous prime is 2233657. The next prime is 2233709. The reversal of 2233661 is 1663322.

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: 1663322 = 2 ⋅831661.

It is a cyclic number.

It is not a de Polignac number, because 2233661 - 2² = 2233657 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 (2233601) 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, 1925 + ... + 2858.

It is an arithmetic number, because the mean of its divisors is an integer number (559728).

2^2233661 is an apocalyptic number.

It is an amenable number.

2233661 is a deficient number, since it is larger than the sum of its proper divisors (5251).

2233661 is an equidigital number, since it uses as much as digits as its factorization.

2233661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5250.

The product of its digits is 1296, while the sum is 23.

The square root of 2233661 is about 1494.5437430868. The cubic root of 2233661 is about 130.7191114562.

Adding to 2233661 its reverse (1663322), we get a palindrome (3896983).

The spelling of 2233661 in words is "two million, two hundred thirty-three thousand, six hundred sixty-one".