51027770220517 has 2 divisors, whose sum is σ = 51027770220518. Its totient is φ = 51027770220516.

The previous prime is 51027770220509. The next prime is 51027770220541. The reversal of 51027770220517 is 71502207772015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50908810071681 + 118960148836 = 7135041^2 + 344906^2 .

It is a cyclic number.

It is not a de Polignac number, because 51027770220517 - 2³ = 51027770220509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51027770220547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25513885110258 + 25513885110259.

It is an arithmetic number, because the mean of its divisors is an integer number (25513885110259).

Almost surely, 2^{51027770220517} is an apocalyptic number.

It is an amenable number.

51027770220517 is a deficient number, since it is larger than the sum of its proper divisors (1).

51027770220517 is an equidigital number, since it uses as much as digits as its factorization.

51027770220517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480200, while the sum is 46.

The spelling of 51027770220517 in words is "fifty-one trillion, twenty-seven billion, seven hundred seventy million, two hundred twenty thousand, five hundred seventeen".