131785172033 has 4 divisors (see below), whose sum is σ = 136329488340. Its totient is φ = 127240855728.

The previous prime is 131785172027. The next prime is 131785172041. The reversal of 131785172033 is 330271587131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44930009089 + 86855162944 = 211967^2 + 294712^2 .

It is a cyclic number.

It is not a de Polignac number, because 131785172033 - 2²⁸ = 131516736577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131785172003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2272158110 + ... + 2272158167.

It is an arithmetic number, because the mean of its divisors is an integer number (34082372085).

Almost surely, 2^131785172033 is an apocalyptic number.

It is an amenable number.

131785172033 is a deficient number, since it is larger than the sum of its proper divisors (4544316307).

131785172033 is an equidigital number, since it uses as much as digits as its factorization.

131785172033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4544316306.

The product of its (nonzero) digits is 105840, while the sum is 41.

The spelling of 131785172033 in words is "one hundred thirty-one billion, seven hundred eighty-five million, one hundred seventy-two thousand, thirty-three".