321513112223 has 4 divisors (see below), whose sum is σ = 321609695040. Its totient is φ = 321416529408.

The previous prime is 321513112213. The next prime is 321513112237. The reversal of 321513112223 is 322211315123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322211315123 = 173 ⋅1862493151.

It is a cyclic number.

It is not a de Polignac number, because 321513112223 - 2²⁴ = 321496335007 is a prime.

It is a super-3 number, since 3×321513112223³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321513112192 and 321513112201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321513112213) 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, 48286415 + ... + 48293072.

It is an arithmetic number, because the mean of its divisors is an integer number (80402423760).

Almost surely, 2^321513112223 is an apocalyptic number.

321513112223 is a deficient number, since it is larger than the sum of its proper divisors (96582817).

321513112223 is an equidigital number, since it uses as much as digits as its factorization.

321513112223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96582816.

The product of its digits is 2160, while the sum is 26.

Adding to 321513112223 its reverse (322211315123), we get a palindrome (643724427346).

The spelling of 321513112223 in words is "three hundred twenty-one billion, five hundred thirteen million, one hundred twelve thousand, two hundred twenty-three".