131986530 has 128 divisors (see below), whose sum is σ = 391587840. Its totient is φ = 31415040.

The previous prime is 131986529. The next prime is 131986531. The reversal of 131986530 is 35689131.

It is a happy number.

131986530 is a `hidden beast` number, since 1 + 31 + 98 + 6 + 530 = 666.

It is an interprime number because it is at equal distance from previous prime (131986529) and next prime (131986531).

It is not an unprimeable number, because it can be changed into a prime (131986531) 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 63 ways as a sum of consecutive naturals, for example, 108204 + ... + 109416.

It is an arithmetic number, because the mean of its divisors is an integer number (3059280).

Almost surely, 2^131986530 is an apocalyptic number.

131986530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 131986530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195793920).

131986530 is an abundant number, since it is smaller than the sum of its proper divisors (259601310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131986530 is a wasteful number, since it uses less digits than its factorization.

131986530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273 (or 1267 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 131986530 is about 11488.5390716139. The cubic root of 131986530 is about 509.1470170747.

The spelling of 131986530 in words is "one hundred thirty-one million, nine hundred eighty-six thousand, five hundred thirty".