13521211 has 4 divisors (see below), whose sum is σ = 14750424. Its totient is φ = 12292000.

The previous prime is 13521197. The next prime is 13521253. The reversal of 13521211 is 11212531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13521211 - 2⁷ = 13521083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13521271) 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 in 3 ways as a sum of consecutive naturals, for example, 614590 + ... + 614611.

It is an arithmetic number, because the mean of its divisors is an integer number (3687606).

Almost surely, 2^13521211 is an apocalyptic number.

13521211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13521211 is a deficient number, since it is larger than the sum of its proper divisors (1229213).

13521211 is a wasteful number, since it uses less digits than its factorization.

13521211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229212.

The product of its digits is 60, while the sum is 16.

The square root of 13521211 is about 3677.1199327735. The cubic root of 13521211 is about 238.2347975914.

Adding to 13521211 its reverse (11212531), we get a palindrome (24733742).

The spelling of 13521211 in words is "thirteen million, five hundred twenty-one thousand, two hundred eleven".