51606131539 has 2 divisors, whose sum is σ = 51606131540. Its totient is φ = 51606131538.

The previous prime is 51606131537. The next prime is 51606131567. The reversal of 51606131539 is 93513160615.

51606131539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51606131539 - 2¹ = 51606131537 is a prime.

Together with 51606131537, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51606131537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25803065769 + 25803065770.

It is an arithmetic number, because the mean of its divisors is an integer number (25803065770).

Almost surely, 2^51606131539 is an apocalyptic number.

51606131539 is a deficient number, since it is larger than the sum of its proper divisors (1).

51606131539 is an equidigital number, since it uses as much as digits as its factorization.

51606131539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72900, while the sum is 40.

It can be divided in two parts, 516061 and 31539, that added together give a square (547600 = 740²).

The spelling of 51606131539 in words is "fifty-one billion, six hundred six million, one hundred thirty-one thousand, five hundred thirty-nine".