223003021 has 4 divisors (see below), whose sum is σ = 223212700. Its totient is φ = 222793344.

The previous prime is 223002971. The next prime is 223003163. The reversal of 223003021 is 120300322.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59521225 + 163481796 = 7715^2 + 12786^2 .

It is a cyclic number.

It is not a de Polignac number, because 223003021 - 2²⁷ = 88785293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223002992 and 223003010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23003021) 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, 103236 + ... + 105373.

It is an arithmetic number, because the mean of its divisors is an integer number (55803175).

Almost surely, 2^223003021 is an apocalyptic number.

It is an amenable number.

223003021 is a deficient number, since it is larger than the sum of its proper divisors (209679).

223003021 is a wasteful number, since it uses less digits than its factorization.

223003021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209678.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 223003021 is about 14933.2856732870. The cubic root of 223003021 is about 606.4154378132.

Adding to 223003021 its reverse (120300322), we get a palindrome (343303343).

The spelling of 223003021 in words is "two hundred twenty-three million, three thousand, twenty-one".