136531252 has 24 divisors (see below), whose sum is σ = 280701792. Its totient is φ = 57285600.

The previous prime is 136531249. The next prime is 136531259. The reversal of 136531252 is 252135631.

It is a self number, because there is not a number n which added to its sum of digits gives 136531252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136531259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118774 + ... + 119917.

It is an arithmetic number, because the mean of its divisors is an integer number (11695908).

Almost surely, 2^136531252 is an apocalyptic number.

It is an amenable number.

136531252 is an abundant number, since it is smaller than the sum of its proper divisors (144170540).

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

136531252 is a wasteful number, since it uses less digits than its factorization.

136531252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238719 (or 238717 counting only the distinct ones).

The product of its digits is 5400, while the sum is 28.

The square root of 136531252 is about 11684.6588311341. The cubic root of 136531252 is about 514.9250552331.

Adding to 136531252 its reverse (252135631), we get a palindrome (388666883).

The spelling of 136531252 in words is "one hundred thirty-six million, five hundred thirty-one thousand, two hundred fifty-two".