31320331001 has 2 divisors, whose sum is σ = 31320331002. Its totient is φ = 31320331000.

The previous prime is 31320330997. The next prime is 31320331037. The reversal of 31320331001 is 10013302313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24180250000 + 7140081001 = 155500^2 + 84499^2 .

It is a cyclic number.

It is not a de Polignac number, because 31320331001 - 2² = 31320330997 is a prime.

It is not a weakly prime, because it can be changed into another prime (31320391001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660165500 + 15660165501.

It is an arithmetic number, because the mean of its divisors is an integer number (15660165501).

Almost surely, 2^31320331001 is an apocalyptic number.

It is an amenable number.

31320331001 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320331001 is an equidigital number, since it uses as much as digits as its factorization.

31320331001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 31320331001 its reverse (10013302313), we get a palindrome (41333633314).

The spelling of 31320331001 in words is "thirty-one billion, three hundred twenty million, three hundred thirty-one thousand, one".