131435131 has 4 divisors (see below), whose sum is σ = 131858064. Its totient is φ = 131012200.

The previous prime is 131435119. The next prime is 131435147. The reversal of 131435131 is 131534131.

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

It is a cyclic number.

It is not a de Polignac number, because 131435131 - 2⁵ = 131435099 is a prime.

It is a super-2 number, since 2×131435131² = 34550387321974322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131435431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211000 + ... + 211621.

It is an arithmetic number, because the mean of its divisors is an integer number (32964516).

Almost surely, 2^131435131 is an apocalyptic number.

131435131 is a deficient number, since it is larger than the sum of its proper divisors (422933).

131435131 is an equidigital number, since it uses as much as digits as its factorization.

131435131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422932.

The product of its digits is 540, while the sum is 22.

The square root of 131435131 is about 11464.5161694683. The cubic root of 131435131 is about 508.4370077055.

Adding to 131435131 its reverse (131534131), we get a palindrome (262969262).

The spelling of 131435131 in words is "one hundred thirty-one million, four hundred thirty-five thousand, one hundred thirty-one".