13488731881 has 3 divisors (see below), whose sum is σ = 13488848023. Its totient is φ = 13488615740.

The previous prime is 13488731857. The next prime is 13488731887. The reversal of 13488731881 is 18813788431.

The square root of 13488731881 is 116141.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18813788431 = 31 ⋅606896401.

It can be written as a sum of positive squares in only one way, i.e., 2710139481 + 10778592400 = 52059^2 + 103820^2 .

It is not a de Polignac number, because 13488731881 - 2¹⁷ = 13488600809 is a prime.

It is a super-2 number, since 2×13488731881² (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 (13488731887) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 58071 + ... + 174211.

Almost surely, 2^13488731881 is an apocalyptic number.

13488731881 is the 116141-st square number.

13488731881 is the 58071-st centered octagonal number.

It is an amenable number.

13488731881 is a deficient number, since it is larger than the sum of its proper divisors (116142).

13488731881 is an frugal number, since it uses more digits than its factorization.

13488731881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232282 (or 116141 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 52.

The spelling of 13488731881 in words is "thirteen billion, four hundred eighty-eight million, seven hundred thirty-one thousand, eight hundred eighty-one".