13506331 has 2 divisors, whose sum is σ = 13506332. Its totient is φ = 13506330.

The previous prime is 13506319. The next prime is 13506371. The reversal of 13506331 is 13360531.

It is a weak prime.

It is an emirp because it is prime and its reverse (13360531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13506331 - 2¹⁵ = 13473563 is a prime.

It is a super-2 number, since 2×13506331² = 364841954163122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13506301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6753165 + 6753166.

It is an arithmetic number, because the mean of its divisors is an integer number (6753166).

Almost surely, 2^13506331 is an apocalyptic number.

13506331 is a deficient number, since it is larger than the sum of its proper divisors (1).

13506331 is an equidigital number, since it uses as much as digits as its factorization.

13506331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 22.

The square root of 13506331 is about 3675.0960531665. The cubic root of 13506331 is about 238.1473735933.

Adding to 13506331 its reverse (13360531), we get a palindrome (26866862).

The spelling of 13506331 in words is "thirteen million, five hundred six thousand, three hundred thirty-one".