13115281 has 2 divisors, whose sum is σ = 13115282. Its totient is φ = 13115280.

The previous prime is 13115261. The next prime is 13115293. The reversal of 13115281 is 18251131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7398400 + 5716881 = 2720^2 + 2391^2 .

It is a cyclic number.

It is not a de Polignac number, because 13115281 - 2¹³ = 13107089 is a prime.

It is a super-2 number, since 2×13115281² = 344021191417922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13115231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6557640 + 6557641.

It is an arithmetic number, because the mean of its divisors is an integer number (6557641).

Almost surely, 2^13115281 is an apocalyptic number.

It is an amenable number.

13115281 is a deficient number, since it is larger than the sum of its proper divisors (1).

13115281 is an equidigital number, since it uses as much as digits as its factorization.

13115281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 22.

The square root of 13115281 is about 3621.5025887054. The cubic root of 13115281 is about 235.8264608063.

The spelling of 13115281 in words is "thirteen million, one hundred fifteen thousand, two hundred eighty-one".