131504541501 has 4 divisors (see below), whose sum is σ = 175339388672.
Its totient is φ = 87669694332.
The previous prime is 131504541451. The next prime is 131504541533. The reversal of 131504541501 is 105145405131.
Adding to 131504541501 its reverse (105145405131), we get a palindrome (236649946632).
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is a de Polignac number, because none of the positive numbers 2k-131504541501 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (131504540501) 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, 21917423581 + ... + 21917423586.
It is an arithmetic number, because the mean of its divisors is an integer number (43834847168).
Almost surely, 2131504541501 is an apocalyptic number.
It is an amenable number.
131504541501 is a deficient number, since it is larger than the sum of its proper divisors (43834847171).
131504541501 is an equidigital number, since it uses as much as digits as its factorization.
131504541501 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 43834847170.
The product of its (nonzero) digits is 6000, while the sum is 30.
The spelling of 131504541501 in words is "one hundred thirty-one billion, five hundred four million, five hundred forty-one thousand, five hundred one".