131240515 has 64 divisors (see below), whose sum is σ = 198696960. Its totient is φ = 81285120.

The previous prime is 131240491. The next prime is 131240521. The reversal of 131240515 is 515042131.

It is a happy number.

It is not a de Polignac number, because 131240515 - 2⁹ = 131240003 is a prime.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 1352947 + ... + 1353043.

It is an arithmetic number, because the mean of its divisors is an integer number (3104640).

Almost surely, 2^131240515 is an apocalyptic number.

131240515 is a deficient number, since it is larger than the sum of its proper divisors (67456445).

131240515 is a wasteful number, since it uses less digits than its factorization.

131240515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 131240515 is about 11456.0252705727. The cubic root of 131240515 is about 508.1859361831.

Adding to 131240515 its reverse (515042131), we get a palindrome (646282646).

The spelling of 131240515 in words is "one hundred thirty-one million, two hundred forty thousand, five hundred fifteen".