131530 has 16 divisors (see below), whose sum is σ = 270720. Its totient is φ = 45072.

The previous prime is 131519. The next prime is 131543. The reversal of 131530 is 35131.

131530 = 14² + 15² + ... + 73².

It is a self number, because there is not a number n which added to its sum of digits gives 131530.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 870 + ... + 1009.

It is an arithmetic number, because the mean of its divisors is an integer number (16920).

2¹³¹⁵³⁰ is an apocalyptic number.

131530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131530 is an abundant number, since it is smaller than the sum of its proper divisors (139190).

It is a weird number, because it is abundant, but not a pseudoperfect number.

131530 is a wasteful number, since it uses less digits than its factorization.

131530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893.

The product of its (nonzero) digits is 45, while the sum is 13.

The square root of 131530 is about 362.6706494879. The cubic root of 131530 is about 50.8559307098.

Adding to 131530 its reverse (35131), we get a palindrome (166661).

The spelling of 131530 in words is "one hundred thirty-one thousand, five hundred thirty".