131905280 has 72 divisors (see below), whose sum is σ = 340301472. Its totient is φ = 48697344.

The previous prime is 131905247. The next prime is 131905289. The reversal of 131905280 is 82509131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131905289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12677 + ... + 20603.

Almost surely, 2^131905280 is an apocalyptic number.

131905280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131905280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170150736).

131905280 is an abundant number, since it is smaller than the sum of its proper divisors (208396192).

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

131905280 is an equidigital number, since it uses as much as digits as its factorization.

131905280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7961 (or 7947 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 131905280 is about 11485.0023944273. The cubic root of 131905280 is about 509.0425198287.

The spelling of 131905280 in words is "one hundred thirty-one million, nine hundred five thousand, two hundred eighty".