13500543 has 16 divisors (see below), whose sum is σ = 20685056. Its totient is φ = 7672320.

The previous prime is 13500493. The next prime is 13500551. The reversal of 13500543 is 34500531.

13500543 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13500543 - 2⁶ = 13500479 is a prime.

It is a super-2 number, since 2×13500543² = 364529322589698, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13500343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2388 + ... + 5718.

It is an arithmetic number, because the mean of its divisors is an integer number (1292816).

Almost surely, 2^13500543 is an apocalyptic number.

13500543 is a deficient number, since it is larger than the sum of its proper divisors (7184513).

13500543 is a wasteful number, since it uses less digits than its factorization.

13500543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3534.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 13500543 is about 3674.3085063723. The cubic root of 13500543 is about 238.1133501923.

The spelling of 13500543 in words is "thirteen million, five hundred thousand, five hundred forty-three".