131230320 has 80 divisors (see below), whose sum is σ = 438117792. Its totient is φ = 32302080.

The previous prime is 131230303. The next prime is 131230339. The reversal of 131230320 is 23032131.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 131230320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17911 + ... + 24150.

Almost surely, 2^131230320 is an apocalyptic number.

131230320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131230320 is an abundant number, since it is smaller than the sum of its proper divisors (306887472).

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

131230320 is a wasteful number, since it uses less digits than its factorization.

131230320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42090 (or 42084 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 131230320 is about 11455.5802995745. The cubic root of 131230320 is about 508.1727769088.

Adding to 131230320 its reverse (23032131), we get a palindrome (154262451).

The spelling of 131230320 in words is "one hundred thirty-one million, two hundred thirty thousand, three hundred twenty".