131751387 has 20 divisors (see below), whose sum is σ = 199430440. Its totient is φ = 85965444.

The previous prime is 131751329. The next prime is 131751407. The reversal of 131751387 is 783157131.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

131751387 is a `hidden beast` number, since 131 + 7 + 513 + 8 + 7 = 666.

It is not a de Polignac number, because 131751387 - 2⁸ = 131751131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131751287) 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 19 ways as a sum of consecutive naturals, for example, 2803198 + ... + 2803244.

It is an arithmetic number, because the mean of its divisors is an integer number (9971522).

Almost surely, 2^131751387 is an apocalyptic number.

131751387 is a deficient number, since it is larger than the sum of its proper divisors (67679053).

131751387 is an frugal number, since it uses more digits than its factorization.

131751387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 50 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 131751387 is about 11478.3007017589. The cubic root of 131751387 is about 508.8444772996.

The spelling of 131751387 in words is "one hundred thirty-one million, seven hundred fifty-one thousand, three hundred eighty-seven".