131502665201 has 4 divisors (see below), whose sum is σ = 131951480052. Its totient is φ = 131053850352.

The previous prime is 131502665153. The next prime is 131502665207. The reversal of 131502665201 is 102566205131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 107322415201 + 24180250000 = 327601^2 + 155500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131502665201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131502665207) 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 3 ways as a sum of consecutive naturals, for example, 224406986 + ... + 224407571.

It is an arithmetic number, because the mean of its divisors is an integer number (32987870013).

Almost surely, 2^131502665201 is an apocalyptic number.

It is an amenable number.

131502665201 is a deficient number, since it is larger than the sum of its proper divisors (448814851).

131502665201 is an equidigital number, since it uses as much as digits as its factorization.

131502665201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448814850.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 131502665201 in words is "one hundred thirty-one billion, five hundred two million, six hundred sixty-five thousand, two hundred one".