1255521132017 has 2 divisors, whose sum is σ = 1255521132018. Its totient is φ = 1255521132016.

The previous prime is 1255521132011. The next prime is 1255521132059. The reversal of 1255521132017 is 7102311255521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1139447367601 + 116073764416 = 1067449^2 + 340696^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255521132017 - 2¹⁰ = 1255521130993 is a prime.

It is not a weakly prime, because it can be changed into another prime (1255521132011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627760566008 + 627760566009.

It is an arithmetic number, because the mean of its divisors is an integer number (627760566009).

Almost surely, 2^{1255521132017} is an apocalyptic number.

It is an amenable number.

1255521132017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255521132017 is an equidigital number, since it uses as much as digits as its factorization.

1255521132017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21000, while the sum is 35.

Adding to 1255521132017 its reverse (7102311255521), we get a palindrome (8357832387538).

The spelling of 1255521132017 in words is "one trillion, two hundred fifty-five billion, five hundred twenty-one million, one hundred thirty-two thousand, seventeen".