131530345 has 4 divisors (see below), whose sum is σ = 157836420. Its totient is φ = 105224272.

The previous prime is 131530291. The next prime is 131530387. The reversal of 131530345 is 543035131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543035131 = 17 ⋅31943243.

It can be written as a sum of positive squares in 2 ways, for example, as 71978256 + 59552089 = 8484^2 + 7717^2 .

It is a cyclic number.

It is not a de Polignac number, because 131530345 - 2¹⁵ = 131497577 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13153030 + ... + 13153039.

It is an arithmetic number, because the mean of its divisors is an integer number (39459105).

Almost surely, 2^131530345 is an apocalyptic number.

It is an amenable number.

131530345 is a deficient number, since it is larger than the sum of its proper divisors (26306075).

131530345 is an equidigital number, since it uses as much as digits as its factorization.

131530345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26306074.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 131530345 is about 11468.6679697339. The cubic root of 131530345 is about 508.5597517436.

Adding to 131530345 its reverse (543035131), we get a palindrome (674565476).

The spelling of 131530345 in words is "one hundred thirty-one million, five hundred thirty thousand, three hundred forty-five".