223000021 has 8 divisors (see below), whose sum is σ = 230449824. Its totient is φ = 215653200.

The previous prime is 223000013. The next prime is 223000031. The reversal of 223000021 is 120000322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 223000021 - 2³ = 223000013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222999971 and 223000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223000031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21331 + ... + 30016.

It is an arithmetic number, because the mean of its divisors is an integer number (28806228).

Almost surely, 2^223000021 is an apocalyptic number.

It is an amenable number.

223000021 is a deficient number, since it is larger than the sum of its proper divisors (7449803).

223000021 is a wasteful number, since it uses less digits than its factorization.

223000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51491.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 223000021 is about 14933.1852262001. The cubic root of 223000021 is about 606.4127184861.

Adding to 223000021 its reverse (120000322), we get a palindrome (343000343).

The spelling of 223000021 in words is "two hundred twenty-three million, twenty-one", and thus it is an aban number.