135431361 has 18 divisors (see below), whose sum is σ = 211830918. Its totient is φ = 83341440.

The previous prime is 135431353. The next prime is 135431399. The reversal of 135431361 is 163134531.

It can be written as a sum of positive squares in 3 ways, for example, as 13549761 + 121881600 = 3681^2 + 11040^2 .

It is not a de Polignac number, because 135431361 - 2³ = 135431353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135431341) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 43000 + ... + 46041.

Almost surely, 2^135431361 is an apocalyptic number.

It is an amenable number.

135431361 is a deficient number, since it is larger than the sum of its proper divisors (76399557).

135431361 is a wasteful number, since it uses less digits than its factorization.

135431361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89073 (or 89057 counting only the distinct ones).

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

The square root of 135431361 is about 11637.4980558538. The cubic root of 135431361 is about 513.5385860018.

Adding to 135431361 its reverse (163134531), we get a palindrome (298565892).

The spelling of 135431361 in words is "one hundred thirty-five million, four hundred thirty-one thousand, three hundred sixty-one".