131311431433 has 64 divisors (see below), whose sum is σ = 179972997120. Its totient is φ = 92792189952.

The previous prime is 131311431353. The next prime is 131311431457. The reversal of 131311431433 is 334134113131.

It is a happy number.

It is not a de Polignac number, because 131311431433 - 2²⁵ = 131277877001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131311431463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4504258 + ... + 4533316.

It is an arithmetic number, because the mean of its divisors is an integer number (2812078080).

Almost surely, 2^131311431433 is an apocalyptic number.

131311431433 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

131311431433 is a deficient number, since it is larger than the sum of its proper divisors (48661565687).

131311431433 is a wasteful number, since it uses less digits than its factorization.

131311431433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29246.

The product of its digits is 3888, while the sum is 28.

Adding to 131311431433 its reverse (334134113131), we get a palindrome (465445544564).

The spelling of 131311431433 in words is "one hundred thirty-one billion, three hundred eleven million, four hundred thirty-one thousand, four hundred thirty-three".