131326465 has 4 divisors (see below), whose sum is σ = 157591764. Its totient is φ = 105061168.

The previous prime is 131326451. The next prime is 131326523. The reversal of 131326465 is 564623131.

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 102090816 + 29235649 = 10104^2 + 5407^2 .

It is a cyclic number.

It is not a de Polignac number, because 131326465 - 2⁷ = 131326337 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13132642 + ... + 13132651.

It is an arithmetic number, because the mean of its divisors is an integer number (39397941).

Almost surely, 2^131326465 is an apocalyptic number.

It is an amenable number.

131326465 is a deficient number, since it is larger than the sum of its proper divisors (26265299).

131326465 is an equidigital number, since it uses as much as digits as its factorization.

131326465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26265298.

The product of its digits is 12960, while the sum is 31.

The square root of 131326465 is about 11459.7759576704. The cubic root of 131326465 is about 508.2968497212.

Adding to 131326465 its reverse (564623131), we get a palindrome (695949596).

The spelling of 131326465 in words is "one hundred thirty-one million, three hundred twenty-six thousand, four hundred sixty-five".