131376115509 has 8 divisors (see below), whose sum is σ = 175172998560. Its totient is φ = 87581654736.

The previous prime is 131376115427. The next prime is 131376115513. The reversal of 131376115509 is 905511673131.

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

It is not a de Polignac number, because 131376115509 - 2³² = 127081148213 is a prime.

It is a super-2 number, since 2×131376115509² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131376115009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474994 + ... + 698835.

It is an arithmetic number, because the mean of its divisors is an integer number (21896624820).

Almost surely, 2^131376115509 is an apocalyptic number.

It is an amenable number.

131376115509 is a deficient number, since it is larger than the sum of its proper divisors (43796883051).

131376115509 is a wasteful number, since it uses less digits than its factorization.

131376115509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211139.

The product of its (nonzero) digits is 85050, while the sum is 42.

The spelling of 131376115509 in words is "one hundred thirty-one billion, three hundred seventy-six million, one hundred fifteen thousand, five hundred nine".