13531101521 has 12 divisors (see below), whose sum is σ = 15802985520. Its totient is φ = 11551869000.

The previous prime is 13531101517. The next prime is 13531101581. The reversal of 13531101521 is 12510113531.

It is not a de Polignac number, because 13531101521 - 2² = 13531101517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13531101581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 537791 + ... + 562388.

It is an arithmetic number, because the mean of its divisors is an integer number (1316915460).

Almost surely, 2^13531101521 is an apocalyptic number.

It is an amenable number.

13531101521 is a deficient number, since it is larger than the sum of its proper divisors (2271883999).

13531101521 is a wasteful number, since it uses less digits than its factorization.

13531101521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100444 (or 1100437 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 23.

The spelling of 13531101521 in words is "thirteen billion, five hundred thirty-one million, one hundred one thousand, five hundred twenty-one".