131503515 has 64 divisors (see below), whose sum is σ = 250048512. Its totient is φ = 58176000.

The previous prime is 131503481. The next prime is 131503553. The reversal of 131503515 is 515305131.

It is not a de Polignac number, because 131503515 - 2⁷ = 131503387 is a prime.

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 63 ways as a sum of consecutive naturals, for example, 216342 + ... + 216948.

It is an arithmetic number, because the mean of its divisors is an integer number (3907008).

Almost surely, 2^131503515 is an apocalyptic number.

131503515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131503515 is a deficient number, since it is larger than the sum of its proper divisors (118544997).

131503515 is a wasteful number, since it uses less digits than its factorization.

131503515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740.

The product of its (nonzero) digits is 1125, while the sum is 24.

The square root of 131503515 is about 11467.4982014387. The cubic root of 131503515 is about 508.5251701520.

Adding to 131503515 its reverse (515305131), we get a palindrome (646808646).

The spelling of 131503515 in words is "one hundred thirty-one million, five hundred three thousand, five hundred fifteen".