13521031 has 2 divisors, whose sum is σ = 13521032. Its totient is φ = 13521030.

The previous prime is 13521029. The next prime is 13521043. The reversal of 13521031 is 13012531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13521031 - 2¹ = 13521029 is a prime.

It is a super-2 number, since 2×13521031² = 365636558605922, which contains 22 as substring.

Together with 13521029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 13520996 and 13521014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13521061) 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, 6760515 + 6760516.

It is an arithmetic number, because the mean of its divisors is an integer number (6760516).

Almost surely, 2^13521031 is an apocalyptic number.

13521031 is a deficient number, since it is larger than the sum of its proper divisors (1).

13521031 is an equidigital number, since it uses as much as digits as its factorization.

13521031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 13521031 is about 3677.0954570150. The cubic root of 13521031 is about 238.2337404264.

Adding to 13521031 its reverse (13012531), we get a palindrome (26533562).

The spelling of 13521031 in words is "thirteen million, five hundred twenty-one thousand, thirty-one".