131528913 has 4 divisors (see below), whose sum is σ = 175371888. Its totient is φ = 87685940.

The previous prime is 131528911. The next prime is 131528977. The reversal of 131528913 is 319825131.

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 131528913 - 2¹ = 131528911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131528911) 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, 21921483 + ... + 21921488.

It is an arithmetic number, because the mean of its divisors is an integer number (43842972).

Almost surely, 2^131528913 is an apocalyptic number.

It is an amenable number.

131528913 is a deficient number, since it is larger than the sum of its proper divisors (43842975).

131528913 is an equidigital number, since it uses as much as digits as its factorization.

131528913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43842974.

The product of its digits is 6480, while the sum is 33.

The square root of 131528913 is about 11468.6055385997. The cubic root of 131528913 is about 508.5579061360.

The spelling of 131528913 in words is "one hundred thirty-one million, five hundred twenty-eight thousand, nine hundred thirteen".