13501331 has 2 divisors, whose sum is σ = 13501332. Its totient is φ = 13501330.

The previous prime is 13501321. The next prime is 13501339. The reversal of 13501331 is 13310531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13501331 - 2¹⁰ = 13500307 is a prime.

It is a super-2 number, since 2×13501331² = 364571877543122, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (13501339) 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, 6750665 + 6750666.

It is an arithmetic number, because the mean of its divisors is an integer number (6750666).

Almost surely, 2^13501331 is an apocalyptic number.

13501331 is a deficient number, since it is larger than the sum of its proper divisors (1).

13501331 is an equidigital number, since it uses as much as digits as its factorization.

13501331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 135, while the sum is 17.

The square root of 13501331 is about 3674.4157358688. The cubic root of 13501331 is about 238.1179828373.

Adding to 13501331 its reverse (13310531), we get a palindrome (26811862).

The spelling of 13501331 in words is "thirteen million, five hundred one thousand, three hundred thirty-one".