131255161 has 4 divisors (see below), whose sum is σ = 134047872. Its totient is φ = 128462452.

The previous prime is 131255149. The next prime is 131255183. The reversal of 131255161 is 161552131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131255161 - 2¹⁷ = 131124089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131255561) 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 3 ways as a sum of consecutive naturals, for example, 1396285 + ... + 1396378.

It is an arithmetic number, because the mean of its divisors is an integer number (33511968).

Almost surely, 2^131255161 is an apocalyptic number.

It is an amenable number.

131255161 is a deficient number, since it is larger than the sum of its proper divisors (2792711).

131255161 is an equidigital number, since it uses as much as digits as its factorization.

131255161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2792710.

The product of its digits is 900, while the sum is 25.

The square root of 131255161 is about 11456.6644796817. The cubic root of 131255161 is about 508.2048394269.

The spelling of 131255161 in words is "one hundred thirty-one million, two hundred fifty-five thousand, one hundred sixty-one".