51561156230351 has 2 divisors, whose sum is σ = 51561156230352. Its totient is φ = 51561156230350.

The previous prime is 51561156230303. The next prime is 51561156230387. The reversal of 51561156230351 is 15303265116515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51561156230351 - 2¹⁰ = 51561156229327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51561156290351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25780578115175 + 25780578115176.

It is an arithmetic number, because the mean of its divisors is an integer number (25780578115176).

Almost surely, 2^{51561156230351} is an apocalyptic number.

51561156230351 is a deficient number, since it is larger than the sum of its proper divisors (1).

51561156230351 is an equidigital number, since it uses as much as digits as its factorization.

51561156230351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 405000, while the sum is 44.

The spelling of 51561156230351 in words is "fifty-one trillion, five hundred sixty-one billion, one hundred fifty-six million, two hundred thirty thousand, three hundred fifty-one".