131255805 has 8 divisors (see below), whose sum is σ = 210009312. Its totient is φ = 70003088.

The previous prime is 131255791. The next prime is 131255807. The reversal of 131255805 is 508552131.

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 131255805 - 2¹¹ = 131253757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131255807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4375179 + ... + 4375208.

It is an arithmetic number, because the mean of its divisors is an integer number (26251164).

Almost surely, 2^131255805 is an apocalyptic number.

131255805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131255805 is a deficient number, since it is larger than the sum of its proper divisors (78753507).

131255805 is an equidigital number, since it uses as much as digits as its factorization.

131255805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8750395.

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 131255805 is about 11456.6925855589. The cubic root of 131255805 is about 508.2056705901.

The spelling of 131255805 in words is "one hundred thirty-one million, two hundred fifty-five thousand, eight hundred five".