135243563 has 16 divisors (see below), whose sum is σ = 166897920. Its totient is φ = 106720416.

The previous prime is 135243553. The next prime is 135243571. The reversal of 135243563 is 365342531.

135243563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 135243563 - 2¹⁰ = 135242539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135243503) 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, 36356 + ... + 39902.

It is an arithmetic number, because the mean of its divisors is an integer number (10431120).

Almost surely, 2^135243563 is an apocalyptic number.

135243563 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

135243563 is a deficient number, since it is larger than the sum of its proper divisors (31654357).

135243563 is a wasteful number, since it uses less digits than its factorization.

135243563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3986.

The product of its digits is 32400, while the sum is 32.

The square root of 135243563 is about 11629.4265980744. The cubic root of 135243563 is about 513.3011074483.

The spelling of 135243563 in words is "one hundred thirty-five million, two hundred forty-three thousand, five hundred sixty-three".