51013135504187 has 2 divisors, whose sum is σ = 51013135504188. Its totient is φ = 51013135504186.

The previous prime is 51013135504181. The next prime is 51013135504231. The reversal of 51013135504187 is 78140553131015.

It is a happy number.

It is an a-pointer prime, because the next prime (51013135504231) can be obtained adding 51013135504187 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51013135504187 - 2²⁰ = 51013134455611 is a prime.

It is not a weakly prime, because it can be changed into another prime (51013135504181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25506567752093 + 25506567752094.

It is an arithmetic number, because the mean of its divisors is an integer number (25506567752094).

Almost surely, 2^{51013135504187} is an apocalyptic number.

51013135504187 is a deficient number, since it is larger than the sum of its proper divisors (1).

51013135504187 is an equidigital number, since it uses as much as digits as its factorization.

51013135504187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252000, while the sum is 44.

The spelling of 51013135504187 in words is "fifty-one trillion, thirteen billion, one hundred thirty-five million, five hundred four thousand, one hundred eighty-seven".