13143540 has 24 divisors (see below), whose sum is σ = 36802080. Its totient is φ = 3504928.

The previous prime is 13143539. The next prime is 13143551. The reversal of 13143540 is 4534131.

13143540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109470 + ... + 109589.

It is an arithmetic number, because the mean of its divisors is an integer number (1533420).

Almost surely, 2^13143540 is an apocalyptic number.

13143540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13143540 is an abundant number, since it is smaller than the sum of its proper divisors (23658540).

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

13143540 is a wasteful number, since it uses less digits than its factorization.

13143540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219071 (or 219069 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 13143540 is about 3625.4020466701. The cubic root of 13143540 is about 235.9957147551.

Adding to 13143540 its reverse (4534131), we get a palindrome (17677671).

The spelling of 13143540 in words is "thirteen million, one hundred forty-three thousand, five hundred forty".