51521561059 has 2 divisors, whose sum is σ = 51521561060. Its totient is φ = 51521561058.

The previous prime is 51521560997. The next prime is 51521561089. The reversal of 51521561059 is 95016512515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51521561059 - 2¹⁵ = 51521528291 is a prime.

It is not a weakly prime, because it can be changed into another prime (51521561089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25760780529 + 25760780530.

It is an arithmetic number, because the mean of its divisors is an integer number (25760780530).

Almost surely, 2^51521561059 is an apocalyptic number.

51521561059 is a deficient number, since it is larger than the sum of its proper divisors (1).

51521561059 is an equidigital number, since it uses as much as digits as its factorization.

51521561059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67500, while the sum is 40.

The spelling of 51521561059 in words is "fifty-one billion, five hundred twenty-one million, five hundred sixty-one thousand, fifty-nine".