131280015 has 16 divisors (see below), whose sum is σ = 213609600. Its totient is φ = 68828832.

The previous prime is 131280011. The next prime is 131280043. The reversal of 131280015 is 510082131.

It is not a de Polignac number, because 131280015 - 2² = 131280011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131279973 and 131280000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131280011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73285 + ... + 75054.

It is an arithmetic number, because the mean of its divisors is an integer number (13350600).

Almost surely, 2^131280015 is an apocalyptic number.

131280015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131280015 is a deficient number, since it is larger than the sum of its proper divisors (82329585).

131280015 is a wasteful number, since it uses less digits than its factorization.

131280015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148406.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 131280015 is about 11457.7491245009. The cubic root of 131280015 is about 508.2369146759.

The spelling of 131280015 in words is "one hundred thirty-one million, two hundred eighty thousand, fifteen".