51630556220213 has 2 divisors, whose sum is σ = 51630556220214. Its totient is φ = 51630556220212.

The previous prime is 51630556220141. The next prime is 51630556220227. The reversal of 51630556220213 is 31202265503615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48360021414769 + 3270534805444 = 6954137^2 + 1808462^2 .

It is a cyclic number.

It is not a de Polignac number, because 51630556220213 - 2¹² = 51630556216117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51630556220513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25815278110106 + 25815278110107.

It is an arithmetic number, because the mean of its divisors is an integer number (25815278110107).

Almost surely, 2^{51630556220213} is an apocalyptic number.

It is an amenable number.

51630556220213 is a deficient number, since it is larger than the sum of its proper divisors (1).

51630556220213 is an equidigital number, since it uses as much as digits as its factorization.

51630556220213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324000, while the sum is 41.

The spelling of 51630556220213 in words is "fifty-one trillion, six hundred thirty billion, five hundred fifty-six million, two hundred twenty thousand, two hundred thirteen".