131520615 has 8 divisors (see below), whose sum is σ = 210433008. Its totient is φ = 70144320.

The previous prime is 131520593. The next prime is 131520629. The reversal of 131520615 is 516025131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131520615 - 2⁵ = 131520583 is a prime.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 4384006 + ... + 4384035.

It is an arithmetic number, because the mean of its divisors is an integer number (26304126).

Almost surely, 2^131520615 is an apocalyptic number.

131520615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131520615 is a deficient number, since it is larger than the sum of its proper divisors (78912393).

131520615 is an equidigital number, since it uses as much as digits as its factorization.

131520615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8768049.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 131520615 is about 11468.2437626692. The cubic root of 131520615 is about 508.5472111434.

Adding to 131520615 its reverse (516025131), we get a palindrome (647545746).

The spelling of 131520615 in words is "one hundred thirty-one million, five hundred twenty thousand, six hundred fifteen".