313322312021 has 8 divisors (see below), whose sum is σ = 314979737688. Its totient is φ = 311667840000.

The previous prime is 313322312011. The next prime is 313322312047. The reversal of 313322312021 is 120213223313.

It can be written as a sum of positive squares in 4 ways, for example, as 26148507025 + 287173804996 = 161705^2 + 535886^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313322312021 is a prime.

It is a super-2 number, since 2×313322312021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313322312011) 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, 525530 + ... + 950171.

It is an arithmetic number, because the mean of its divisors is an integer number (39372467211).

Almost surely, 2^313322312021 is an apocalyptic number.

It is an amenable number.

313322312021 is a deficient number, since it is larger than the sum of its proper divisors (1657425667).

313322312021 is a wasteful number, since it uses less digits than its factorization.

313322312021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476823.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 313322312021 its reverse (120213223313), we get a palindrome (433535535334).

The spelling of 313322312021 in words is "three hundred thirteen billion, three hundred twenty-two million, three hundred twelve thousand, twenty-one".