223223021 has 8 divisors (see below), whose sum is σ = 255673920. Its totient is φ = 190912608.

The previous prime is 223223003. The next prime is 223223023. The reversal of 223223021 is 120322322.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223223021 is a prime.

It is a super-3 number, since 3×223223021³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223223023) 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, 31691 + ... + 38088.

It is an arithmetic number, because the mean of its divisors is an integer number (31959240).

Almost surely, 2^223223021 is an apocalyptic number.

It is an amenable number.

223223021 is a deficient number, since it is larger than the sum of its proper divisors (32450899).

223223021 is an equidigital number, since it uses as much as digits as its factorization.

223223021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70243.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 223223021 is about 14940.6499523950. The cubic root of 223223021 is about 606.6147886981.

Adding to 223223021 its reverse (120322322), we get a palindrome (343545343).

The spelling of 223223021 in words is "two hundred twenty-three million, two hundred twenty-three thousand, twenty-one".