223426661 has 4 divisors (see below), whose sum is σ = 223456800. Its totient is φ = 223396524.

The previous prime is 223426639. The next prime is 223426663. The reversal of 223426661 is 166624322.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223426661 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 (223426663) 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, 4670 + ... + 21648.

It is an arithmetic number, because the mean of its divisors is an integer number (55864200).

Almost surely, 2^223426661 is an apocalyptic number.

It is an amenable number.

223426661 is a deficient number, since it is larger than the sum of its proper divisors (30139).

223426661 is a wasteful number, since it uses less digits than its factorization.

223426661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30138.

The product of its digits is 20736, while the sum is 32.

The square root of 223426661 is about 14947.4633633938. The cubic root of 223426661 is about 606.7991984264.

The spelling of 223426661 in words is "two hundred twenty-three million, four hundred twenty-six thousand, six hundred sixty-one".