135205543 has 4 divisors (see below), whose sum is σ = 147496968. Its totient is φ = 122914120.

The previous prime is 135205541. The next prime is 135205559. The reversal of 135205543 is 345502531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135205543 - 2¹ = 135205541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135205541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6145696 + ... + 6145717.

It is an arithmetic number, because the mean of its divisors is an integer number (36874242).

Almost surely, 2^135205543 is an apocalyptic number.

135205543 is a deficient number, since it is larger than the sum of its proper divisors (12291425).

135205543 is a wasteful number, since it uses less digits than its factorization.

135205543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12291424.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 135205543 is about 11627.7918368020. The cubic root of 135205543 is about 513.2530027875.

The spelling of 135205543 in words is "one hundred thirty-five million, two hundred five thousand, five hundred forty-three".