13542321531 has 16 divisors (see below), whose sum is σ = 18496974848. Its totient is φ = 8810272800.

The previous prime is 13542321521. The next prime is 13542321557. The reversal of 13542321531 is 13512324531.

It is a de Polignac number, because none of the positive numbers 2^k-13542321531 is a prime.

It is a super-2 number, since 2×13542321531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13542321521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268105 + ... + 314586.

It is an arithmetic number, because the mean of its divisors is an integer number (1156060928).

Almost surely, 2^13542321531 is an apocalyptic number.

13542321531 is a deficient number, since it is larger than the sum of its proper divisors (4954653317).

13542321531 is a wasteful number, since it uses less digits than its factorization.

13542321531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582882.

The product of its digits is 10800, while the sum is 30.

The spelling of 13542321531 in words is "thirteen billion, five hundred forty-two million, three hundred twenty-one thousand, five hundred thirty-one".