323215131321 has 12 divisors (see below), whose sum is σ = 472111990740. Its totient is φ = 213055666560.

The previous prime is 323215131301. The next prime is 323215131359. The reversal of 323215131321 is 123131512323.

323215131321 is a `hidden beast` number, since 3 + 2 + 321 + 5 + 1 + 313 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 150105879225 + 173109252096 = 387435^2 + 416064^2 .

It is not a de Polignac number, because 323215131321 - 2¹⁰ = 323215130297 is a prime.

It is a super-2 number, since 2×323215131321² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (323215131301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201756460 + ... + 201758061.

It is an arithmetic number, because the mean of its divisors is an integer number (39342665895).

Almost surely, 2^323215131321 is an apocalyptic number.

It is an amenable number.

323215131321 is a deficient number, since it is larger than the sum of its proper divisors (148896859419).

323215131321 is a wasteful number, since it uses less digits than its factorization.

323215131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403514616 (or 403514613 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

Adding to 323215131321 its reverse (123131512323), we get a palindrome (446346643644).

The spelling of 323215131321 in words is "three hundred twenty-three billion, two hundred fifteen million, one hundred thirty-one thousand, three hundred twenty-one".