131481475749 has 32 divisors (see below), whose sum is σ = 220811606400. Its totient is φ = 76653164160.

The previous prime is 131481475721. The next prime is 131481475789. The reversal of 131481475749 is 947574184131.

131481475749 is a `hidden beast` number, since 1 + 31 + 481 + 47 + 57 + 49 = 666.

It is not a de Polignac number, because 131481475749 - 2¹⁶ = 131481410213 is a prime.

It is a super-2 number, since 2×131481475749² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131481475695 and 131481475704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131481475709) 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 31 ways as a sum of consecutive naturals, for example, 9850992 + ... + 9864329.

It is an arithmetic number, because the mean of its divisors is an integer number (6900362700).

Almost surely, 2^131481475749 is an apocalyptic number.

131481475749 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

131481475749 is a deficient number, since it is larger than the sum of its proper divisors (89330130651).

131481475749 is a wasteful number, since it uses less digits than its factorization.

131481475749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19715362 (or 19715356 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The spelling of 131481475749 in words is "one hundred thirty-one billion, four hundred eighty-one million, four hundred seventy-five thousand, seven hundred forty-nine".