131478280 has 16 divisors (see below), whose sum is σ = 295826220. Its totient is φ = 52591296.

The previous prime is 131478251. The next prime is 131478287. The reversal of 131478280 is 82874131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 128187684 + 3290596 = 11322^2 + 1814^2 .

It is a super-2 number, since 2×131478280² = 34573076223516800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131478287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1643439 + ... + 1643518.

Almost surely, 2^131478280 is an apocalyptic number.

131478280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131478280 is an abundant number, since it is smaller than the sum of its proper divisors (164347940).

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

131478280 is a wasteful number, since it uses less digits than its factorization.

131478280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3286968 (or 3286964 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 131478280 is about 11466.3978650664. The cubic root of 131478280 is about 508.4926400872.

The spelling of 131478280 in words is "one hundred thirty-one million, four hundred seventy-eight thousand, two hundred eighty".