13531208 has 8 divisors (see below), whose sum is σ = 25371030. Its totient is φ = 6765600.

The previous prime is 13531183. The next prime is 13531229. The reversal of 13531208 is 80213531.

It can be written as a sum of positive squares in only one way, i.e., 10510564 + 3020644 = 3242^2 + 1738^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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, 845693 + ... + 845708.

Almost surely, 2^13531208 is an apocalyptic number.

It is an amenable number.

13531208 is a deficient number, since it is larger than the sum of its proper divisors (11839822).

13531208 is a wasteful number, since it uses less digits than its factorization.

13531208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691407 (or 1691403 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 13531208 is about 3678.4790335137. The cubic root of 13531208 is about 238.2934966372.

Adding to 13531208 its reverse (80213531), we get a palindrome (93744739).

The spelling of 13531208 in words is "thirteen million, five hundred thirty-one thousand, two hundred eight".