13143224 has 8 divisors (see below), whose sum is σ = 24643560. Its totient is φ = 6571608.

The previous prime is 13143223. The next prime is 13143233. The reversal of 13143224 is 42234131.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×13143224² = 345488674228352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13143196 and 13143205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13143223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821444 + ... + 821459.

It is an arithmetic number, because the mean of its divisors is an integer number (3080445).

Almost surely, 2^13143224 is an apocalyptic number.

It is an amenable number.

13143224 is a deficient number, since it is larger than the sum of its proper divisors (11500336).

13143224 is a wasteful number, since it uses less digits than its factorization.

13143224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642909 (or 1642905 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 13143224 is about 3625.3584650349. The cubic root of 13143224 is about 235.9938234523.

Adding to 13143224 its reverse (42234131), we get a palindrome (55377355).

The spelling of 13143224 in words is "thirteen million, one hundred forty-three thousand, two hundred twenty-four".