223431220013 has 4 divisors (see below), whose sum is σ = 223436025180. Its totient is φ = 223426414848.

The previous prime is 223431220007. The next prime is 223431220021. The reversal of 223431220013 is 310022134322.

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 113712607369 + 109718612644 = 337213^2 + 331238^2 .

It is a cyclic number.

It is not a de Polignac number, because 223431220013 - 2³⁴ = 206251350829 is a prime.

It is a super-2 number, since 2×223431220013² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223431220093) 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, 2332148 + ... + 2426061.

It is an arithmetic number, because the mean of its divisors is an integer number (55859006295).

Almost surely, 2^223431220013 is an apocalyptic number.

It is an amenable number.

223431220013 is a deficient number, since it is larger than the sum of its proper divisors (4805167).

223431220013 is an equidigital number, since it uses as much as digits as its factorization.

223431220013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4805166.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 223431220013 its reverse (310022134322), we get a palindrome (533453354335).

The spelling of 223431220013 in words is "two hundred twenty-three billion, four hundred thirty-one million, two hundred twenty thousand, thirteen".