321431202313 has 6 divisors (see below), whose sum is σ = 348058639374. Its totient is φ = 296705725056.

The previous prime is 321431202293. The next prime is 321431202329. The reversal of 321431202313 is 313202134123.

It can be written as a sum of positive squares in 3 ways, for example, as 8422283529 + 313008918784 = 91773^2 + 559472^2 .

It is not a de Polignac number, because 321431202313 - 2¹³ = 321431194121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321431202373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 950979720 + ... + 950980057.

It is an arithmetic number, because the mean of its divisors is an integer number (58009773229).

Almost surely, 2^321431202313 is an apocalyptic number.

It is an amenable number.

321431202313 is a deficient number, since it is larger than the sum of its proper divisors (26627437061).

321431202313 is a wasteful number, since it uses less digits than its factorization.

321431202313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901959803 (or 1901959790 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 321431202313 its reverse (313202134123), we get a palindrome (634633336436).

The spelling of 321431202313 in words is "three hundred twenty-one billion, four hundred thirty-one million, two hundred two thousand, three hundred thirteen".