51812025522409 has 2 divisors, whose sum is σ = 51812025522410. Its totient is φ = 51812025522408.

The previous prime is 51812025522331. The next prime is 51812025522421. The reversal of 51812025522409 is 90422552021815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50333746458384 + 1478279064025 = 7094628^2 + 1215845^2 .

It is a cyclic number.

It is not a de Polignac number, because 51812025522409 - 2¹³ = 51812025514217 is a prime.

It is a super-2 number, since 2×51812025522409² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51812025522479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25906012761204 + 25906012761205.

It is an arithmetic number, because the mean of its divisors is an integer number (25906012761205).

Almost surely, 2^{51812025522409} is an apocalyptic number.

It is an amenable number.

51812025522409 is a deficient number, since it is larger than the sum of its proper divisors (1).

51812025522409 is an equidigital number, since it uses as much as digits as its factorization.

51812025522409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576000, while the sum is 46.

The spelling of 51812025522409 in words is "fifty-one trillion, eight hundred twelve billion, twenty-five million, five hundred twenty-two thousand, four hundred nine".