51316503587 has 2 divisors, whose sum is σ = 51316503588. Its totient is φ = 51316503586.

The previous prime is 51316503551. The next prime is 51316503631. The reversal of 51316503587 is 78530561315.

It is an a-pointer prime, because the next prime (51316503631) can be obtained adding 51316503587 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51316503587 - 2¹⁰ = 51316502563 is a prime.

It is not a weakly prime, because it can be changed into another prime (51316403587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25658251793 + 25658251794.

It is an arithmetic number, because the mean of its divisors is an integer number (25658251794).

Almost surely, 2^51316503587 is an apocalyptic number.

51316503587 is a deficient number, since it is larger than the sum of its proper divisors (1).

51316503587 is an equidigital number, since it uses as much as digits as its factorization.

51316503587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378000, while the sum is 44.

The spelling of 51316503587 in words is "fifty-one billion, three hundred sixteen million, five hundred three thousand, five hundred eighty-seven".