51355212413 has 2 divisors, whose sum is σ = 51355212414. Its totient is φ = 51355212412.

The previous prime is 51355212407. The next prime is 51355212427. The reversal of 51355212413 is 31421255315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51346200409 + 9012004 = 226597^2 + 3002^2 .

It is a cyclic number.

It is not a de Polignac number, because 51355212413 - 2¹⁴ = 51355196029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51355212413.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51355212313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25677606206 + 25677606207.

It is an arithmetic number, because the mean of its divisors is an integer number (25677606207).

Almost surely, 2^51355212413 is an apocalyptic number.

It is an amenable number.

51355212413 is a deficient number, since it is larger than the sum of its proper divisors (1).

51355212413 is an equidigital number, since it uses as much as digits as its factorization.

51355212413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000, while the sum is 32.

Adding to 51355212413 its reverse (31421255315), we get a palindrome (82776467728).

The spelling of 51355212413 in words is "fifty-one billion, three hundred fifty-five million, two hundred twelve thousand, four hundred thirteen".