31302002230073 has 2 divisors, whose sum is σ = 31302002230074. Its totient is φ = 31302002230072.

The previous prime is 31302002230021. The next prime is 31302002230117. The reversal of 31302002230073 is 37003220020313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25452801935929 + 5849200294144 = 5045077^2 + 2418512^2 .

It is an emirp because it is prime and its reverse (37003220020313) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31302002230073 is a prime.

It is a super-2 number, since 2×31302002230073² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31302002230003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15651001115036 + 15651001115037.

It is an arithmetic number, because the mean of its divisors is an integer number (15651001115037).

Almost surely, 2^{31302002230073} is an apocalyptic number.

It is an amenable number.

31302002230073 is a deficient number, since it is larger than the sum of its proper divisors (1).

31302002230073 is an equidigital number, since it uses as much as digits as its factorization.

31302002230073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 26.

Adding to 31302002230073 its reverse (37003220020313), we get a palindrome (68305222250386).

The spelling of 31302002230073 in words is "thirty-one trillion, three hundred two billion, two million, two hundred thirty thousand, seventy-three".