51939332213 has 2 divisors, whose sum is σ = 51939332214. Its totient is φ = 51939332212.

The previous prime is 51939332191. The next prime is 51939332227. The reversal of 51939332213 is 31223393915.

51939332213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51939321604 + 10609 = 227902^2 + 103^2 .

It is a cyclic number.

It is not a de Polignac number, because 51939332213 - 2¹² = 51939328117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51939332513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25969666106 + 25969666107.

It is an arithmetic number, because the mean of its divisors is an integer number (25969666107).

Almost surely, 2^51939332213 is an apocalyptic number.

It is an amenable number.

51939332213 is a deficient number, since it is larger than the sum of its proper divisors (1).

51939332213 is an equidigital number, since it uses as much as digits as its factorization.

51939332213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131220, while the sum is 41.

The spelling of 51939332213 in words is "fifty-one billion, nine hundred thirty-nine million, three hundred thirty-two thousand, two hundred thirteen".