131662501 has 8 divisors (see below), whose sum is σ = 139537944. Its totient is φ = 123801600.

The previous prime is 131662499. The next prime is 131662507. The reversal of 131662501 is 105266131.

It can be written as a sum of positive squares in 4 ways, for example, as 4198401 + 127464100 = 2049^2 + 11290^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131662501 - 2¹ = 131662499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131662507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19141 + ... + 25093.

It is an arithmetic number, because the mean of its divisors is an integer number (17442243).

Almost surely, 2^131662501 is an apocalyptic number.

It is an amenable number.

131662501 is a deficient number, since it is larger than the sum of its proper divisors (7875443).

131662501 is a wasteful number, since it uses less digits than its factorization.

131662501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7271.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 131662501 is about 11474.4281338984. The cubic root of 131662501 is about 508.7300210085.

The spelling of 131662501 in words is "one hundred thirty-one million, six hundred sixty-two thousand, five hundred one".