313203222221 has 8 divisors (see below), whose sum is σ = 321650508984. Its totient is φ = 304794420480.

The previous prime is 313203222127. The next prime is 313203222251. The reversal of 313203222221 is 122222302313.

It can be written as a sum of positive squares in 4 ways, for example, as 8007744196 + 305195478025 = 89486^2 + 552445^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 313203222221 - 2²² = 313199027917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313203222251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9604760 + ... + 9637313.

It is an arithmetic number, because the mean of its divisors is an integer number (40206313623).

Almost surely, 2^313203222221 is an apocalyptic number.

It is an amenable number.

313203222221 is a deficient number, since it is larger than the sum of its proper divisors (8447286763).

313203222221 is a wasteful number, since it uses less digits than its factorization.

313203222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19242511.

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

Adding to 313203222221 its reverse (122222302313), we get a palindrome (435425524534).

The spelling of 313203222221 in words is "three hundred thirteen billion, two hundred three million, two hundred twenty-two thousand, two hundred twenty-one".