131521218788 has 48 divisors (see below), whose sum is σ = 236423867904. Its totient is φ = 63988855680.

The previous prime is 131521218781. The next prime is 131521218797. The reversal of 131521218788 is 887812125131.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is not an unprimeable number, because it can be changed into a prime (131521218781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26191718 + ... + 26196738.

It is an arithmetic number, because the mean of its divisors is an integer number (4925497248).

Almost surely, 2^131521218788 is an apocalyptic number.

It is an amenable number.

131521218788 is a deficient number, since it is larger than the sum of its proper divisors (104902649116).

131521218788 is a wasteful number, since it uses less digits than its factorization.

131521218788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5852 (or 5850 counting only the distinct ones).

The product of its digits is 215040, while the sum is 47.

The spelling of 131521218788 in words is "one hundred thirty-one billion, five hundred twenty-one million, two hundred eighteen thousand, seven hundred eighty-eight".