136531253 has 4 divisors (see below), whose sum is σ = 136605420. Its totient is φ = 136457088.

The previous prime is 136531249. The next prime is 136531259. The reversal of 136531253 is 352135631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99540529 + 36990724 = 9977^2 + 6082^2 .

It is a cyclic number.

It is not a de Polignac number, because 136531253 - 2² = 136531249 is a prime.

It is a Duffinian number.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34250 + ... + 38027.

It is an arithmetic number, because the mean of its divisors is an integer number (34151355).

Almost surely, 2^136531253 is an apocalyptic number.

It is an amenable number.

136531253 is a deficient number, since it is larger than the sum of its proper divisors (74167).

136531253 is an equidigital number, since it uses as much as digits as its factorization.

136531253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74166.

The product of its digits is 8100, while the sum is 29.

The square root of 136531253 is about 11684.6588739252. The cubic root of 136531253 is about 514.9250564903.

Adding to 136531253 its reverse (352135631), we get a palindrome (488666884).

The spelling of 136531253 in words is "one hundred thirty-six million, five hundred thirty-one thousand, two hundred fifty-three".