131331501 has 24 divisors (see below), whose sum is σ = 219046464. Its totient is φ = 74269440.

The previous prime is 131331493. The next prime is 131331521. The reversal of 131331501 is 105133131.

131331501 is a `hidden beast` number, since 131 + 3 + 31 + 501 = 666.

It is not a de Polignac number, because 131331501 - 2³ = 131331493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131331521) 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 23 ways as a sum of consecutive naturals, for example, 4635 + ... + 16856.

It is an arithmetic number, because the mean of its divisors is an integer number (9126936).

Almost surely, 2^131331501 is an apocalyptic number.

It is an amenable number.

131331501 is a deficient number, since it is larger than the sum of its proper divisors (87714963).

131331501 is a wasteful number, since it uses less digits than its factorization.

131331501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21601 (or 21598 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 18.

The square root of 131331501 is about 11459.9956806275. The cubic root of 131331501 is about 508.3033468889.

Adding to 131331501 its reverse (105133131), we get a palindrome (236464632).

The spelling of 131331501 in words is "one hundred thirty-one million, three hundred thirty-one thousand, five hundred one".