131065505 has 8 divisors (see below), whose sum is σ = 160936512. Its totient is φ = 102413808.

The previous prime is 131065499. The next prime is 131065511. The reversal of 131065505 is 505560131.

It is an interprime number because it is at equal distance from previous prime (131065499) and next prime (131065511).

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 131065505 - 2¹² = 131061409 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 7 ways as a sum of consecutive naturals, for example, 304589 + ... + 305018.

It is an arithmetic number, because the mean of its divisors is an integer number (20117064).

Almost surely, 2^131065505 is an apocalyptic number.

It is an amenable number.

131065505 is a deficient number, since it is larger than the sum of its proper divisors (29871007).

131065505 is an equidigital number, since it uses as much as digits as its factorization.

131065505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609655.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 131065505 is about 11448.3843838334. The cubic root of 131065505 is about 507.9599460535.

It can be divided in two parts, 1310 and 65505, that multiplied together give a triangular number (85811550 = T₁₃₁₀₀).

The spelling of 131065505 in words is "one hundred thirty-one million, sixty-five thousand, five hundred five".