51505150111139 has 2 divisors, whose sum is σ = 51505150111140. Its totient is φ = 51505150111138.

The previous prime is 51505150110977. The next prime is 51505150111171. The reversal of 51505150111139 is 93111105150515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51505150111139 - 2¹⁶ = 51505150045603 is a prime.

It is not a weakly prime, because it can be changed into another prime (51505150111439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25752575055569 + 25752575055570.

It is an arithmetic number, because the mean of its divisors is an integer number (25752575055570).

Almost surely, 2^{51505150111139} is an apocalyptic number.

51505150111139 is a deficient number, since it is larger than the sum of its proper divisors (1).

51505150111139 is an equidigital number, since it uses as much as digits as its factorization.

51505150111139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16875, while the sum is 38.

The spelling of 51505150111139 in words is "fifty-one trillion, five hundred five billion, one hundred fifty million, one hundred eleven thousand, one hundred thirty-nine".