223121313 has 12 divisors (see below), whose sum is σ = 339249040. Its totient is φ = 140918616.

The previous prime is 223121287. The next prime is 223121333. The reversal of 223121313 is 313121322.

223121313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 223121313 - 2¹⁴ = 223104929 is a prime.

It is a super-3 number, since 3×223121313³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223121333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 652231 + ... + 652572.

Almost surely, 2^223121313 is an apocalyptic number.

It is an amenable number.

223121313 is a deficient number, since it is larger than the sum of its proper divisors (116127727).

223121313 is a wasteful number, since it uses less digits than its factorization.

223121313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304828 (or 1304825 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 223121313 is about 14937.2458304736. The cubic root of 223121313 is about 606.5226432591.

Adding to 223121313 its reverse (313121322), we get a palindrome (536242635).

Subtracting 223121313 from its reverse (313121322), we obtain a palindrome (90000009).

The spelling of 223121313 in words is "two hundred twenty-three million, one hundred twenty-one thousand, three hundred thirteen".