131530313 has 4 divisors (see below), whose sum is σ = 133493520. Its totient is φ = 129567108.

The previous prime is 131530291. The next prime is 131530387. The reversal of 131530313 is 313035131.

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 131530313 - 2²² = 127336009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131533313) 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, 981503 + ... + 981636.

It is an arithmetic number, because the mean of its divisors is an integer number (33373380).

Almost surely, 2^131530313 is an apocalyptic number.

It is an amenable number.

131530313 is a deficient number, since it is larger than the sum of its proper divisors (1963207).

131530313 is an equidigital number, since it uses as much as digits as its factorization.

131530313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1963206.

The product of its (nonzero) digits is 405, while the sum is 20.

The square root of 131530313 is about 11468.6665746285. Note that the first 3 decimals coincide. The cubic root of 131530313 is about 508.5597105011.

Adding to 131530313 its reverse (313035131), we get a palindrome (444565444).

The spelling of 131530313 in words is "one hundred thirty-one million, five hundred thirty thousand, three hundred thirteen".