531321031313 has 8 divisors (see below), whose sum is σ = 533446806240. Its totient is φ = 529195709440.

The previous prime is 531321031309. The next prime is 531321031343. The reversal of 531321031313 is 313130123135.

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 531321031313 - 2² = 531321031309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531321031343) 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, 2343158 + ... + 2559888.

It is an arithmetic number, because the mean of its divisors is an integer number (66680850780).

Almost surely, 2^531321031313 is an apocalyptic number.

It is an amenable number.

531321031313 is a deficient number, since it is larger than the sum of its proper divisors (2125774927).

531321031313 is a wasteful number, since it uses less digits than its factorization.

531321031313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226527.

The product of its (nonzero) digits is 2430, while the sum is 26.

Adding to 531321031313 its reverse (313130123135), we get a palindrome (844451154448).

The spelling of 531321031313 in words is "five hundred thirty-one billion, three hundred twenty-one million, thirty-one thousand, three hundred thirteen".