131505345506 has 8 divisors (see below), whose sum is σ = 207640019280. Its totient is φ = 62292005748.

The previous prime is 131505345473. The next prime is 131505345511. The reversal of 131505345506 is 605543505131.

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

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 3460666987 = 131505345506 / (1 + 3 + 1 + 5 + 0 + 5 + 3 + 4 + 5 + 5 + 0 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 131505345506.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1730333456 + ... + 1730333531.

It is an arithmetic number, because the mean of its divisors is an integer number (25955002410).

Almost surely, 2^131505345506 is an apocalyptic number.

131505345506 is a deficient number, since it is larger than the sum of its proper divisors (76134673774).

131505345506 is a wasteful number, since it uses less digits than its factorization.

131505345506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3460667008.

The product of its (nonzero) digits is 135000, while the sum is 38.

The spelling of 131505345506 in words is "one hundred thirty-one billion, five hundred five million, three hundred forty-five thousand, five hundred six".