131343636 has 24 divisors (see below), whose sum is σ = 314752480. Its totient is φ = 42597792.

The previous prime is 131343631. The next prime is 131343647. The reversal of 131343636 is 636343131.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131343631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147466 + ... + 148353.

Almost surely, 2^131343636 is an apocalyptic number.

It is an amenable number.

131343636 is an abundant number, since it is smaller than the sum of its proper divisors (183408844).

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

131343636 is a wasteful number, since it uses less digits than its factorization.

131343636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295863 (or 295861 counting only the distinct ones).

The product of its digits is 11664, while the sum is 30.

The square root of 131343636 is about 11460.5251188591. The cubic root of 131343636 is about 508.3190021102.

Adding to 131343636 its reverse (636343131), we get a palindrome (767686767).

The spelling of 131343636 in words is "one hundred thirty-one million, three hundred forty-three thousand, six hundred thirty-six".