13443131000 has 128 divisors (see below), whose sum is σ = 33985224000. Its totient is φ = 4947724800.

The previous prime is 13443130937. The next prime is 13443131033. The reversal of 13443131000 is 13134431.

It is a super-2 number, since 2×13443131000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4535519 + ... + 4538481.

Almost surely, 2^13443131000 is an apocalyptic number.

13443131000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13443131000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16992612000).

13443131000 is an abundant number, since it is smaller than the sum of its proper divisors (20542093000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13443131000 is a wasteful number, since it uses less digits than its factorization.

13443131000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3346 (or 3332 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 13443131000 its reverse (13134431), we get a palindrome (13456265431).

The spelling of 13443131000 in words is "thirteen billion, four hundred forty-three million, one hundred thirty-one thousand".