131566785 has 64 divisors (see below), whose sum is σ = 253366272. Its totient is φ = 56998656.

The previous prime is 131566777. The next prime is 131566801. The reversal of 131566785 is 587665131.

It is not a de Polignac number, because 131566785 - 2³ = 131566777 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 378982 + ... + 379328.

It is an arithmetic number, because the mean of its divisors is an integer number (3958848).

Almost surely, 2^131566785 is an apocalyptic number.

131566785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131566785 is a deficient number, since it is larger than the sum of its proper divisors (121799487).

131566785 is a wasteful number, since it uses less digits than its factorization.

131566785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542.

The product of its digits is 151200, while the sum is 42.

The square root of 131566785 is about 11470.2565359280. The cubic root of 131566785 is about 508.6067122789.

The spelling of 131566785 in words is "one hundred thirty-one million, five hundred sixty-six thousand, seven hundred eighty-five".