131522130 has 80 divisors (see below), whose sum is σ = 355406040. Its totient is φ = 34898688.

The previous prime is 131522113. The next prime is 131522143. The reversal of 131522130 is 31225131.

131522130 is a `hidden beast` number, since 13 + 1 + 522 + 130 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 129208689 + 2313441 = 11367^2 + 1521^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 321366 + ... + 321774.

Almost surely, 2^131522130 is an apocalyptic number.

131522130 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 131522130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177703020).

131522130 is an abundant number, since it is smaller than the sum of its proper divisors (223883910).

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

131522130 is a wasteful number, since it uses less digits than its factorization.

131522130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825 (or 816 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 131522130 is about 11468.3098144408. The cubic root of 131522130 is about 508.5491638058.

Adding to 131522130 its reverse (31225131), we get a palindrome (162747261).

The spelling of 131522130 in words is "one hundred thirty-one million, five hundred twenty-two thousand, one hundred thirty".