223021023 has 4 divisors (see below), whose sum is σ = 297361368. Its totient is φ = 148680680.

The previous prime is 223021021. The next prime is 223021033. The reversal of 223021023 is 320120322.

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

It is a cyclic number.

It is not a de Polignac number, because 223021023 - 2¹ = 223021021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 223020993 and 223021011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223021021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37170168 + ... + 37170173.

It is an arithmetic number, because the mean of its divisors is an integer number (74340342).

Almost surely, 2^223021023 is an apocalyptic number.

223021023 is a deficient number, since it is larger than the sum of its proper divisors (74340345).

223021023 is an equidigital number, since it uses as much as digits as its factorization.

223021023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74340344.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 223021023 is about 14933.8884085827. Note that the first 3 decimals coincide. The cubic root of 223021023 is about 606.4317550764.

Adding to 223021023 its reverse (320120322), we get a palindrome (543141345).

The spelling of 223021023 in words is "two hundred twenty-three million, twenty-one thousand, twenty-three".