31500040301 has 2 divisors, whose sum is σ = 31500040302. Its totient is φ = 31500040300.

The previous prime is 31500040267. The next prime is 31500040331. The reversal of 31500040301 is 10304000513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29291980201 + 2208060100 = 171149^2 + 46990^2 .

It is an emirp because it is prime and its reverse (10304000513) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31500040301 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31500040301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31500040331) 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 as a sum of consecutive naturals, namely, 15750020150 + 15750020151.

It is an arithmetic number, because the mean of its divisors is an integer number (15750020151).

Almost surely, 2^31500040301 is an apocalyptic number.

It is an amenable number.

31500040301 is a deficient number, since it is larger than the sum of its proper divisors (1).

31500040301 is an equidigital number, since it uses as much as digits as its factorization.

31500040301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 17.

Adding to 31500040301 its reverse (10304000513), we get a palindrome (41804040814).

The spelling of 31500040301 in words is "thirty-one billion, five hundred million, forty thousand, three hundred one".