31020030073 has 2 divisors, whose sum is σ = 31020030074. Its totient is φ = 31020030072.

The previous prime is 31020029987. The next prime is 31020030077. The reversal of 31020030073 is 37003002013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16231524409 + 14788505664 = 127403^2 + 121608^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31020030073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31020030073.

It is not a weakly prime, because it can be changed into another prime (31020030077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15510015036 + 15510015037.

It is an arithmetic number, because the mean of its divisors is an integer number (15510015037).

Almost surely, 2^31020030073 is an apocalyptic number.

It is an amenable number.

31020030073 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020030073 is an equidigital number, since it uses as much as digits as its factorization.

31020030073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 19.

Adding to 31020030073 its reverse (37003002013), we get a palindrome (68023032086).

The spelling of 31020030073 in words is "thirty-one billion, twenty million, thirty thousand, seventy-three".