631206216843353 has 2 divisors, whose sum is σ = 631206216843354. Its totient is φ = 631206216843352.

The previous prime is 631206216843259. The next prime is 631206216843383. The reversal of 631206216843353 is 353348612602136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376470316482649 + 254735900360704 = 19402843^2 + 15960448^2 .

It is a cyclic number.

It is not a de Polignac number, because 631206216843353 - 2³⁶ = 631137497366617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 631206216843295 and 631206216843304.

It is not a weakly prime, because it can be changed into another prime (631206216843383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315603108421676 + 315603108421677.

It is an arithmetic number, because the mean of its divisors is an integer number (315603108421677).

Almost surely, 2^{631206216843353} is an apocalyptic number.

It is an amenable number.

631206216843353 is a deficient number, since it is larger than the sum of its proper divisors (1).

631206216843353 is an equidigital number, since it uses as much as digits as its factorization.

631206216843353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11197440, while the sum is 53.

The spelling of 631206216843353 in words is "six hundred thirty-one trillion, two hundred six billion, two hundred sixteen million, eight hundred forty-three thousand, three hundred fifty-three".