7131530 has 16 divisors (see below), whose sum is σ = 14670720. Its totient is φ = 2445072.

The previous prime is 7131511. The next prime is 7131533. The reversal of 7131530 is 351317.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7131533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50870 + ... + 51009.

It is an arithmetic number, because the mean of its divisors is an integer number (916920).

Almost surely, 2^7131530 is an apocalyptic number.

7131530 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

7131530 is an abundant number, since it is smaller than the sum of its proper divisors (7539190).

7131530 is a wasteful number, since it uses less digits than its factorization.

7131530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101893.

The product of its (nonzero) digits is 315, while the sum is 20.

The square root of 7131530 is about 2670.4924639474. The cubic root of 7131530 is about 192.4838239064.

Adding to 7131530 its reverse (351317), we get a palindrome (7482847).

The spelling of 7131530 in words is "seven million, one hundred thirty-one thousand, five hundred thirty".