13531202397 has 24 divisors (see below), whose sum is σ = 19808979840. Its totient is φ = 8899188480.

The previous prime is 13531202383. The next prime is 13531202449. The reversal of 13531202397 is 79320213531.

It is a happy number.

13531202397 is a `hidden beast` number, since 1 + 35 + 31 + 202 + 397 = 666.

13531202397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13531202397 - 2⁸ = 13531202141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531202297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 921997 + ... + 936557.

It is an arithmetic number, because the mean of its divisors is an integer number (825374160).

Almost surely, 2^13531202397 is an apocalyptic number.

It is an amenable number.

13531202397 is a deficient number, since it is larger than the sum of its proper divisors (6277777443).

13531202397 is a wasteful number, since it uses less digits than its factorization.

13531202397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15953 (or 15950 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The spelling of 13531202397 in words is "thirteen billion, five hundred thirty-one million, two hundred two thousand, three hundred ninety-seven".