131324515 has 16 divisors (see below), whose sum is σ = 180861120. Its totient is φ = 89671680.

The previous prime is 131324491. The next prime is 131324527. The reversal of 131324515 is 515423131.

It is a happy number.

It is not a de Polignac number, because 131324515 - 2⁵ = 131324483 is a prime.

It is a super-2 number, since 2×131324515² = 34492256479970450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131324515.

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 15 ways as a sum of consecutive naturals, for example, 651 + ... + 16219.

It is an arithmetic number, because the mean of its divisors is an integer number (11303820).

Almost surely, 2^131324515 is an apocalyptic number.

131324515 is a deficient number, since it is larger than the sum of its proper divisors (49536605).

131324515 is a wasteful number, since it uses less digits than its factorization.

131324515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15822.

The product of its digits is 1800, while the sum is 25.

The square root of 131324515 is about 11459.6908771572. The cubic root of 131324515 is about 508.2943338948.

Adding to 131324515 its reverse (515423131), we get a palindrome (646747646).

The spelling of 131324515 in words is "one hundred thirty-one million, three hundred twenty-four thousand, five hundred fifteen".