135131436 has 96 divisors (see below), whose sum is σ = 404732160. Its totient is φ = 38534400.

The previous prime is 135131431. The next prime is 135131467. The reversal of 135131436 is 634131531.

135131436 is a `hidden beast` number, since 1 + 3 + 513 + 143 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (135131431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16851 + ... + 23541.

It is an arithmetic number, because the mean of its divisors is an integer number (4215960).

Almost surely, 2^135131436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135131436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202366080).

135131436 is an abundant number, since it is smaller than the sum of its proper divisors (269600724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135131436 is a wasteful number, since it uses less digits than its factorization.

135131436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6732 (or 6724 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 135131436 is about 11624.6047674749. The cubic root of 135131436 is about 513.1592132610.

Adding to 135131436 its reverse (634131531), we get a palindrome (769262967).

The spelling of 135131436 in words is "one hundred thirty-five million, one hundred thirty-one thousand, four hundred thirty-six".