131255533 has 4 divisors (see below), whose sum is σ = 133053628. Its totient is φ = 129457440.

The previous prime is 131255513. The next prime is 131255543. The reversal of 131255533 is 335552131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 335552131 = 941 ⋅356591.

It can be written as a sum of positive squares in 2 ways, for example, as 48135844 + 83119689 = 6938^2 + 9117^2 .

It is a cyclic number.

It is not a de Polignac number, because 131255533 - 2¹³ = 131247341 is a prime.

It is a super-2 number, since 2×131255533² = 34456029886228178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131255513) 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, 898938 + ... + 899083.

It is an arithmetic number, because the mean of its divisors is an integer number (33263407).

Almost surely, 2^131255533 is an apocalyptic number.

It is an amenable number.

131255533 is a deficient number, since it is larger than the sum of its proper divisors (1798095).

131255533 is an equidigital number, since it uses as much as digits as its factorization.

131255533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798094.

The product of its digits is 6750, while the sum is 28.

The square root of 131255533 is about 11456.6807147620. The cubic root of 131255533 is about 508.2053195401.

The spelling of 131255533 in words is "one hundred thirty-one million, two hundred fifty-five thousand, five hundred thirty-three".