31312030073 has 2 divisors, whose sum is σ = 31312030074. Its totient is φ = 31312030072.

The previous prime is 31312030049. The next prime is 31312030081. The reversal of 31312030073 is 37003021313.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18769822009 + 12542208064 = 137003^2 + 111992^2 .

It is a cyclic number.

It is not a de Polignac number, because 31312030073 - 2³² = 27017062777 is a prime.

It is not a weakly prime, because it can be changed into another prime (31312030003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656015036 + 15656015037.

It is an arithmetic number, because the mean of its divisors is an integer number (15656015037).

Almost surely, 2^31312030073 is an apocalyptic number.

It is an amenable number.

31312030073 is a deficient number, since it is larger than the sum of its proper divisors (1).

31312030073 is an equidigital number, since it uses as much as digits as its factorization.

31312030073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 23.

Adding to 31312030073 its reverse (37003021313), we get a palindrome (68315051386).

The spelling of 31312030073 in words is "thirty-one billion, three hundred twelve million, thirty thousand, seventy-three".