309812631041 has 2 divisors, whose sum is σ = 309812631042. Its totient is φ = 309812631040.

The previous prime is 309812631013. The next prime is 309812631059. The reversal of 309812631041 is 140136218903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 282811240000 + 27001391041 = 531800^2 + 164321^2 .

It is an emirp because it is prime and its reverse (140136218903) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-309812631041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 309812630986 and 309812631004.

It is not a weakly prime, because it can be changed into another prime (309812631091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154906315520 + 154906315521.

It is an arithmetic number, because the mean of its divisors is an integer number (154906315521).

Almost surely, 2^309812631041 is an apocalyptic number.

It is an amenable number.

309812631041 is a deficient number, since it is larger than the sum of its proper divisors (1).

309812631041 is an equidigital number, since it uses as much as digits as its factorization.

309812631041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

Adding to 309812631041 its reverse (140136218903), we get a palindrome (449948849944).

The spelling of 309812631041 in words is "three hundred nine billion, eight hundred twelve million, six hundred thirty-one thousand, forty-one".