131850865 has 4 divisors (see below), whose sum is σ = 158221044. Its totient is φ = 105480688.

The previous prime is 131850853. The next prime is 131850877. The reversal of 131850865 is 568058131.

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

It is an interprime number because it is at equal distance from previous prime (131850853) and next prime (131850877).

It can be written as a sum of positive squares in 2 ways, for example, as 14691889 + 117158976 = 3833^2 + 10824^2 .

It is a cyclic number.

It is not a de Polignac number, because 131850865 - 2⁷ = 131850737 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13185082 + ... + 13185091.

It is an arithmetic number, because the mean of its divisors is an integer number (39555261).

Almost surely, 2^131850865 is an apocalyptic number.

It is an amenable number.

131850865 is a deficient number, since it is larger than the sum of its proper divisors (26370179).

131850865 is an equidigital number, since it uses as much as digits as its factorization.

131850865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26370178.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 131850865 is about 11482.6331910412. The cubic root of 131850865 is about 508.9725116163.

The spelling of 131850865 in words is "one hundred thirty-one million, eight hundred fifty thousand, eight hundred sixty-five".