135523043 has 4 divisors (see below), whose sum is σ = 138406560. Its totient is φ = 132639528.

The previous prime is 135523019. The next prime is 135523051. The reversal of 135523043 is 340325531.

135523043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 135523043 - 2¹⁰ = 135522019 is a prime.

It is a super-3 number, since 3×135523043³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135523543) 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, 1441688 + ... + 1441781.

It is an arithmetic number, because the mean of its divisors is an integer number (34601640).

Almost surely, 2^135523043 is an apocalyptic number.

135523043 is a deficient number, since it is larger than the sum of its proper divisors (2883517).

135523043 is an equidigital number, since it uses as much as digits as its factorization.

135523043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2883516.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 135523043 is about 11641.4364663473. The cubic root of 135523043 is about 513.6544420438.

Adding to 135523043 its reverse (340325531), we get a palindrome (475848574).

The spelling of 135523043 in words is "one hundred thirty-five million, five hundred twenty-three thousand, forty-three".