131423424551505 has 24 divisors (see below), whose sum is σ = 233356714816680. Its totient is φ = 68382920090880.

The previous prime is 131423424551431. The next prime is 131423424551509. The reversal of 131423424551505 is 505155424324131.

131423424551505 is a `hidden beast` number, since 1 + 3 + 1 + 4 + 2 + 3 + 42 + 4 + 551 + 50 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 421939885761 + 131001484665744 = 649569^2 + 11445588^2 .

It is not a de Polignac number, because 131423424551505 - 2⁸ = 131423424551249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (131423424551509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35616102370 + ... + 35616106059.

It is an arithmetic number, because the mean of its divisors is an integer number (9723196450695).

Almost surely, 2^{131423424551505} is an apocalyptic number.

131423424551505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131423424551505 is a deficient number, since it is larger than the sum of its proper divisors (101933290265175).

131423424551505 is a wasteful number, since it uses less digits than its factorization.

131423424551505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71232208481 (or 71232208478 counting only the distinct ones).

The product of its (nonzero) digits is 1440000, while the sum is 45.

Adding to 131423424551505 its reverse (505155424324131), we get a palindrome (636578848875636).

The spelling of 131423424551505 in words is "one hundred thirty-one trillion, four hundred twenty-three billion, four hundred twenty-four million, five hundred fifty-one thousand, five hundred five".