51155305361 has 2 divisors, whose sum is σ = 51155305362. Its totient is φ = 51155305360.

The previous prime is 51155305339. The next prime is 51155305379. The reversal of 51155305361 is 16350355115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48285667600 + 2869637761 = 219740^2 + 53569^2 .

It is a cyclic number.

It is not a de Polignac number, because 51155305361 - 2¹⁰ = 51155304337 is a prime.

It is not a weakly prime, because it can be changed into another prime (51155305561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25577652680 + 25577652681.

It is an arithmetic number, because the mean of its divisors is an integer number (25577652681).

Almost surely, 2^51155305361 is an apocalyptic number.

It is an amenable number.

51155305361 is a deficient number, since it is larger than the sum of its proper divisors (1).

51155305361 is an equidigital number, since it uses as much as digits as its factorization.

51155305361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33750, while the sum is 35.

The spelling of 51155305361 in words is "fifty-one billion, one hundred fifty-five million, three hundred five thousand, three hundred sixty-one".