131375515 has 4 divisors (see below), whose sum is σ = 157650624. Its totient is φ = 105100408.

The previous prime is 131375513. The next prime is 131375537. The reversal of 131375515 is 515573131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131375515 - 2¹ = 131375513 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131375513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13137547 + ... + 13137556.

It is an arithmetic number, because the mean of its divisors is an integer number (39412656).

Almost surely, 2^131375515 is an apocalyptic number.

131375515 is a deficient number, since it is larger than the sum of its proper divisors (26275109).

131375515 is an equidigital number, since it uses as much as digits as its factorization.

131375515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26275108.

The product of its digits is 7875, while the sum is 31.

The square root of 131375515 is about 11461.9158520729. The cubic root of 131375515 is about 508.3601242412.

The spelling of 131375515 in words is "one hundred thirty-one million, three hundred seventy-five thousand, five hundred fifteen".