131281755 has 16 divisors (see below), whose sum is σ = 229146624. Its totient is φ = 63651680.

The previous prime is 131281751. The next prime is 131281771. The reversal of 131281755 is 557182131.

It is not a de Polignac number, because 131281755 - 2² = 131281751 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (131281751) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 397659 + ... + 397988.

It is an arithmetic number, because the mean of its divisors is an integer number (14321664).

Almost surely, 2^131281755 is an apocalyptic number.

131281755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131281755 is a deficient number, since it is larger than the sum of its proper divisors (97864869).

131281755 is a wasteful number, since it uses less digits than its factorization.

131281755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795666.

The product of its digits is 8400, while the sum is 33.

The square root of 131281755 is about 11457.8250553934. The cubic root of 131281755 is about 508.2391600756.

The spelling of 131281755 in words is "one hundred thirty-one million, two hundred eighty-one thousand, seven hundred fifty-five".