13520541531 has 48 divisors (see below), whose sum is σ = 22786575360. Its totient is φ = 7083236160.

The previous prime is 13520541523. The next prime is 13520541547. The reversal of 13520541531 is 13514502531.

It is not a de Polignac number, because 13520541531 - 2³ = 13520541523 is a prime.

It is a super-2 number, since 2×13520541531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13520541731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8505 + ... + 164661.

It is an arithmetic number, because the mean of its divisors is an integer number (474720320).

Almost surely, 2^13520541531 is an apocalyptic number.

13520541531 is a deficient number, since it is larger than the sum of its proper divisors (9266033829).

13520541531 is a wasteful number, since it uses less digits than its factorization.

13520541531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156224 (or 156217 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The spelling of 13520541531 in words is "thirteen billion, five hundred twenty million, five hundred forty-one thousand, five hundred thirty-one".