13143233444 has 72 divisors (see below), whose sum is σ = 25908672384. Its totient is φ = 5827852800.

The previous prime is 13143233387. The next prime is 13143233447. The reversal of 13143233444 is 44433234131.

It is a super-2 number, since 2×13143233444² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13143233444.

It is not an unprimeable number, because it can be changed into a prime (13143233447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3331337 + ... + 3335279.

It is an arithmetic number, because the mean of its divisors is an integer number (359842672).

Almost surely, 2^13143233444 is an apocalyptic number.

It is an amenable number.

13143233444 is a deficient number, since it is larger than the sum of its proper divisors (12765438940).

13143233444 is a wasteful number, since it uses less digits than its factorization.

13143233444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4137 (or 4124 counting only the distinct ones).

The product of its digits is 41472, while the sum is 32.

Adding to 13143233444 its reverse (44433234131), we get a palindrome (57576467575).

The spelling of 13143233444 in words is "thirteen billion, one hundred forty-three million, two hundred thirty-three thousand, four hundred forty-four".