13131444331 has 8 divisors (see below), whose sum is σ = 13835195280. Its totient is φ = 12428955648.

The previous prime is 13131444329. The next prime is 13131444341. The reversal of 13131444331 is 13344413131.

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

It is a cyclic number.

It is not a de Polignac number, because 13131444331 - 2¹ = 13131444329 is a prime.

It is a super-2 number, since 2×13131444331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13131444331.

It is not an unprimeable number, because it can be changed into a prime (13131444311) 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, 294166 + ... + 335851.

It is an arithmetic number, because the mean of its divisors is an integer number (1729399410).

Almost surely, 2^13131444331 is an apocalyptic number.

13131444331 is a deficient number, since it is larger than the sum of its proper divisors (703750949).

13131444331 is a wasteful number, since it uses less digits than its factorization.

13131444331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631133.

The product of its digits is 5184, while the sum is 28.

Adding to 13131444331 its reverse (13344413131), we get a palindrome (26475857462).

The spelling of 13131444331 in words is "thirteen billion, one hundred thirty-one million, four hundred forty-four thousand, three hundred thirty-one".