1301511217 has 2 divisors, whose sum is σ = 1301511218. Its totient is φ = 1301511216.

The previous prime is 1301511209. The next prime is 1301511221. The reversal of 1301511217 is 7121151031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 720170896 + 581340321 = 26836^2 + 24111^2 .

It is an emirp because it is prime and its reverse (7121151031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1301511217 - 2³ = 1301511209 is a prime.

It is not a weakly prime, because it can be changed into another prime (1301511227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650755608 + 650755609.

It is an arithmetic number, because the mean of its divisors is an integer number (650755609).

Almost surely, 2^1301511217 is an apocalyptic number.

It is an amenable number.

1301511217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301511217 is an equidigital number, since it uses as much as digits as its factorization.

1301511217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 210, while the sum is 22.

The square root of 1301511217 is about 36076.4634768986. The cubic root of 1301511217 is about 1091.8156248019.

Adding to 1301511217 its reverse (7121151031), we get a palindrome (8422662248).

The spelling of 1301511217 in words is "one billion, three hundred one million, five hundred eleven thousand, two hundred seventeen".