136831225 has 12 divisors (see below), whose sum is σ = 170106300. Its totient is φ = 109184000.

The previous prime is 136831223. The next prime is 136831237. The reversal of 136831225 is 522138631.

136831225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 104976 + 136726249 = 324^2 + 11693^2 .

It is not a de Polignac number, because 136831225 - 2¹ = 136831223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136831223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3201 + ... + 16849.

It is an arithmetic number, because the mean of its divisors is an integer number (14175525).

Almost surely, 2^136831225 is an apocalyptic number.

It is an amenable number.

136831225 is a deficient number, since it is larger than the sum of its proper divisors (33275075).

136831225 is a wasteful number, since it uses less digits than its factorization.

136831225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14060 (or 14055 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 136831225 is about 11697.4879781943. The cubic root of 136831225 is about 515.3018935641.

Adding to 136831225 its reverse (522138631), we get a palindrome (658969856).

The spelling of 136831225 in words is "one hundred thirty-six million, eight hundred thirty-one thousand, two hundred twenty-five".