131217956515 has 8 divisors (see below), whose sum is σ = 157998961008. Its totient is φ = 104616089760.

The previous prime is 131217956497. The next prime is 131217956537. The reversal of 131217956515 is 515659712131.

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

It is not a de Polignac number, because 131217956515 - 2⁹ = 131217956003 is a prime.

It is a super-2 number, since 2×131217956515² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44782821 + ... + 44785750.

It is an arithmetic number, because the mean of its divisors is an integer number (19749870126).

Almost surely, 2^131217956515 is an apocalyptic number.

131217956515 is a deficient number, since it is larger than the sum of its proper divisors (26781004493).

131217956515 is an equidigital number, since it uses as much as digits as its factorization.

131217956515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89568869.

The product of its digits is 283500, while the sum is 46.

The spelling of 131217956515 in words is "one hundred thirty-one billion, two hundred seventeen million, nine hundred fifty-six thousand, five hundred fifteen".