135811263 has 16 divisors (see below), whose sum is σ = 214087680. Its totient is φ = 74930016.

The previous prime is 135811261. The next prime is 135811267. The reversal of 135811263 is 362118531.

It is not a de Polignac number, because 135811263 - 2¹ = 135811261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135811263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135811261) 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, 110895 + ... + 112112.

It is an arithmetic number, because the mean of its divisors is an integer number (13380480).

Almost surely, 2^135811263 is an apocalyptic number.

135811263 is a deficient number, since it is larger than the sum of its proper divisors (78276417).

135811263 is a wasteful number, since it uses less digits than its factorization.

135811263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223046.

The product of its digits is 4320, while the sum is 30.

The square root of 135811263 is about 11653.8089481508. The cubic root of 135811263 is about 514.0183178178.

Adding to 135811263 its reverse (362118531), we get a palindrome (497929794).

It can be divided in two parts, 1358 and 11263, that added together give a palindrome (12621).

The spelling of 135811263 in words is "one hundred thirty-five million, eight hundred eleven thousand, two hundred sixty-three".