313231221331 has 8 divisors (see below), whose sum is σ = 359339675904. Its totient is φ = 267463051080.

The previous prime is 313231221323. The next prime is 313231221349. The reversal of 313231221331 is 133122132313.

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 313231221331 - 2³ = 313231221323 is a prime.

It is a super-3 number, since 3×313231221331³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313231221296 and 313231221305.

It is not an unprimeable number, because it can be changed into a prime (313231221361) 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, 85069105 + ... + 85072786.

It is an arithmetic number, because the mean of its divisors is an integer number (44917459488).

Almost surely, 2^313231221331 is an apocalyptic number.

313231221331 is a deficient number, since it is larger than the sum of its proper divisors (46108454573).

313231221331 is a wasteful number, since it uses less digits than its factorization.

313231221331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170142161.

The product of its digits is 1944, while the sum is 25.

Adding to 313231221331 its reverse (133122132313), we get a palindrome (446353353644).

The spelling of 313231221331 in words is "three hundred thirteen billion, two hundred thirty-one million, two hundred twenty-one thousand, three hundred thirty-one".