51385354247 has 2 divisors, whose sum is σ = 51385354248. Its totient is φ = 51385354246.

The previous prime is 51385354219. The next prime is 51385354271. The reversal of 51385354247 is 74245358315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51385354247 - 2¹² = 51385350151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51385354217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25692677123 + 25692677124.

It is an arithmetic number, because the mean of its divisors is an integer number (25692677124).

Almost surely, 2^51385354247 is an apocalyptic number.

51385354247 is a deficient number, since it is larger than the sum of its proper divisors (1).

51385354247 is an equidigital number, since it uses as much as digits as its factorization.

51385354247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016000, while the sum is 47.

The spelling of 51385354247 in words is "fifty-one billion, three hundred eighty-five million, three hundred fifty-four thousand, two hundred forty-seven".