13531213131 has 8 divisors (see below), whose sum is σ = 18529228944. Its totient is φ = 8777003040.

The previous prime is 13531213127. The next prime is 13531213193. The reversal of 13531213131 is 13131213531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13531213131 - 2² = 13531213127 is a prime.

It is a super-2 number, since 2×13531213131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13531013131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60951300 + ... + 60951521.

It is an arithmetic number, because the mean of its divisors is an integer number (2316153618).

Almost surely, 2^13531213131 is an apocalyptic number.

13531213131 is a deficient number, since it is larger than the sum of its proper divisors (4998015813).

13531213131 is a wasteful number, since it uses less digits than its factorization.

13531213131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121902861.

The product of its digits is 810, while the sum is 24.

Adding to 13531213131 its reverse (13131213531), we get a palindrome (26662426662).

The spelling of 13531213131 in words is "thirteen billion, five hundred thirty-one million, two hundred thirteen thousand, one hundred thirty-one".