131731355305 has 16 divisors (see below), whose sum is σ = 172495534464. Its totient is φ = 95778391680.

The previous prime is 131731355303. The next prime is 131731355339. The reversal of 131731355305 is 503553137131.

It is not a de Polignac number, because 131731355305 - 2¹ = 131731355303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131731355303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124029 + ... + 528058.

It is an arithmetic number, because the mean of its divisors is an integer number (10780970904).

Almost surely, 2^131731355305 is an apocalyptic number.

It is an amenable number.

131731355305 is a deficient number, since it is larger than the sum of its proper divisors (40764179159).

131731355305 is a wasteful number, since it uses less digits than its factorization.

131731355305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655776.

The product of its (nonzero) digits is 70875, while the sum is 37.

The spelling of 131731355305 in words is "one hundred thirty-one billion, seven hundred thirty-one million, three hundred fifty-five thousand, three hundred five".