223343121 has 4 divisors (see below), whose sum is σ = 297790832. Its totient is φ = 148895412.

The previous prime is 223343117. The next prime is 223343129. The reversal of 223343121 is 121343322.

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.

It is not a de Polignac number, because 223343121 - 2² = 223343117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223343129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37223851 + ... + 37223856.

It is an arithmetic number, because the mean of its divisors is an integer number (74447708).

Almost surely, 2^223343121 is an apocalyptic number.

It is an amenable number.

223343121 is a deficient number, since it is larger than the sum of its proper divisors (74447711).

223343121 is an equidigital number, since it uses as much as digits as its factorization.

223343121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74447710.

The product of its digits is 864, while the sum is 21.

The square root of 223343121 is about 14944.6686480497. The cubic root of 223343121 is about 606.7235608934.

Adding to 223343121 its reverse (121343322), we get a palindrome (344686443).

It can be divided in two parts, 2233 and 43121, that added together give a palindrome (45354).

The spelling of 223343121 in words is "two hundred twenty-three million, three hundred forty-three thousand, one hundred twenty-one".