13223131013 has 4 divisors (see below), whose sum is σ = 13404269868. Its totient is φ = 13041992160.

The previous prime is 13223130983. The next prime is 13223131037. The reversal of 13223131013 is 31013132231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4661885284 + 8561245729 = 68278^2 + 92527^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13223131013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13223131613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90569318 + ... + 90569463.

It is an arithmetic number, because the mean of its divisors is an integer number (3351067467).

Almost surely, 2^13223131013 is an apocalyptic number.

It is an amenable number.

13223131013 is a deficient number, since it is larger than the sum of its proper divisors (181138855).

13223131013 is an equidigital number, since it uses as much as digits as its factorization.

13223131013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181138854.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 13223131013 its reverse (31013132231), we get a palindrome (44236263244).

The spelling of 13223131013 in words is "thirteen billion, two hundred twenty-three million, one hundred thirty-one thousand, thirteen".