51387882947 has 2 divisors, whose sum is σ = 51387882948. Its totient is φ = 51387882946.

The previous prime is 51387882943. The next prime is 51387883007. The reversal of 51387882947 is 74928878315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51387882947 - 2² = 51387882943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51387882947.

It is not a weakly prime, because it can be changed into another prime (51387882943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25693941473 + 25693941474.

It is an arithmetic number, because the mean of its divisors is an integer number (25693941474).

Almost surely, 2^51387882947 is an apocalyptic number.

51387882947 is a deficient number, since it is larger than the sum of its proper divisors (1).

51387882947 is an equidigital number, since it uses as much as digits as its factorization.

51387882947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27095040, while the sum is 62.

The spelling of 51387882947 in words is "fifty-one billion, three hundred eighty-seven million, eight hundred eighty-two thousand, nine hundred forty-seven".