1311510001 has 2 divisors, whose sum is σ = 1311510002. Its totient is φ = 1311510000.

The previous prime is 1311509981. The next prime is 1311510049. The reversal of 1311510001 is 1000151131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1211109601 + 100400400 = 34801^2 + 10020^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311510001 - 2⁷ = 1311509873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311510061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655755000 + 655755001.

It is an arithmetic number, because the mean of its divisors is an integer number (655755001).

Almost surely, 2^1311510001 is an apocalyptic number.

It is an amenable number.

1311510001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311510001 is an equidigital number, since it uses as much as digits as its factorization.

1311510001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15, while the sum is 13.

The square root of 1311510001 is about 36214.7760037253. The cubic root of 1311510001 is about 1094.6044319467.

Adding to 1311510001 its reverse (1000151131), we get a palindrome (2311661132).

The spelling of 1311510001 in words is "one billion, three hundred eleven million, five hundred ten thousand, one".