13223131131 has 72 divisors (see below), whose sum is σ = 22540111920. Its totient is φ = 6865732608.

The previous prime is 13223131109. The next prime is 13223131147. The reversal of 13223131131 is 13113132231.

It is a happy number.

It is not a de Polignac number, because 13223131131 - 2⁹ = 13223130619 is a prime.

It is a super-2 number, since 2×13223131131² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 13223131098 and 13223131107.

It is not an unprimeable number, because it can be changed into a prime (13223131231) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1226641 + ... + 1237373.

It is an arithmetic number, because the mean of its divisors is an integer number (313057110).

Almost surely, 2^13223131131 is an apocalyptic number.

13223131131 is a deficient number, since it is larger than the sum of its proper divisors (9316980789).

13223131131 is a wasteful number, since it uses less digits than its factorization.

13223131131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10813 (or 10789 counting only the distinct ones).

The product of its digits is 324, while the sum is 21.

Adding to 13223131131 its reverse (13113132231), we get a palindrome (26336263362).

The spelling of 13223131131 in words is "thirteen billion, two hundred twenty-three million, one hundred thirty-one thousand, one hundred thirty-one".