43661223 has 12 divisors (see below), whose sum is σ = 63132160. Its totient is φ = 29077056.

The previous prime is 43661207. The next prime is 43661249. The reversal of 43661223 is 32216634.

43661223 is a `hidden beast` number, since 43 + 6 + 612 + 2 + 3 = 666.

It is not a de Polignac number, because 43661223 - 2⁴ = 43661207 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 (43661273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9615 + ... + 13407.

Almost surely, 2^43661223 is an apocalyptic number.

43661223 is a deficient number, since it is larger than the sum of its proper divisors (19470937).

43661223 is a wasteful number, since it uses less digits than its factorization.

43661223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5078 (or 5075 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 43661223 is about 6607.6639593732. The cubic root of 43661223 is about 352.1264369094.

Adding to 43661223 its reverse (32216634), we get a palindrome (75877857).

The spelling of 43661223 in words is "forty-three million, six hundred sixty-one thousand, two hundred twenty-three".