223644646 has 4 divisors (see below), whose sum is σ = 335466972. Its totient is φ = 111822322.

The previous prime is 223644643. The next prime is 223644653. The reversal of 223644646 is 646446322.

223644646 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 646446322 = 2 ⋅323223161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223644643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55911160 + ... + 55911163.

It is an arithmetic number, because the mean of its divisors is an integer number (83866743).

Almost surely, 2^223644646 is an apocalyptic number.

223644646 is a deficient number, since it is larger than the sum of its proper divisors (111822326).

223644646 is a wasteful number, since it uses less digits than its factorization.

223644646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111822325.

The product of its digits is 165888, while the sum is 37.

The square root of 223644646 is about 14954.7532911780. The cubic root of 223644646 is about 606.9964743898.

The spelling of 223644646 in words is "two hundred twenty-three million, six hundred forty-four thousand, six hundred forty-six".