51335512247 has 2 divisors, whose sum is σ = 51335512248. Its totient is φ = 51335512246.

The previous prime is 51335512231. The next prime is 51335512253. The reversal of 51335512247 is 74221553315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51335512247 - 2⁴ = 51335512231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51335512247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51335502247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25667756123 + 25667756124.

It is an arithmetic number, because the mean of its divisors is an integer number (25667756124).

Almost surely, 2^51335512247 is an apocalyptic number.

51335512247 is a deficient number, since it is larger than the sum of its proper divisors (1).

51335512247 is an equidigital number, since it uses as much as digits as its factorization.

51335512247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 126000, while the sum is 38.

The spelling of 51335512247 in words is "fifty-one billion, three hundred thirty-five million, five hundred twelve thousand, two hundred forty-seven".