131520330 has 96 divisors (see below), whose sum is σ = 367758144. Its totient is φ = 32491008.

The previous prime is 131520317. The next prime is 131520341. The reversal of 131520330 is 33025131.

131520330 is a `hidden beast` number, since 1 + 315 + 20 + 330 = 666.

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 47 ways as a sum of consecutive naturals, for example, 101869 + ... + 103151.

It is an arithmetic number, because the mean of its divisors is an integer number (3830814).

Almost surely, 2^131520330 is an apocalyptic number.

131520330 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 131520330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183879072).

131520330 is an abundant number, since it is smaller than the sum of its proper divisors (236237814).

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

131520330 is a wasteful number, since it uses less digits than its factorization.

131520330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380 (or 1377 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 131520330 is about 11468.2313370458. The cubic root of 131520330 is about 508.5468438092.

Adding to 131520330 its reverse (33025131), we get a palindrome (164545461).

The spelling of 131520330 in words is "one hundred thirty-one million, five hundred twenty thousand, three hundred thirty".