131031478821 has 8 divisors (see below), whose sum is σ = 174760633024. Its totient is φ = 87328321920.

The previous prime is 131031478819. The next prime is 131031478849. The reversal of 131031478821 is 128874130131.

It is a happy number.

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

It is not a de Polignac number, because 131031478821 - 2¹ = 131031478819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131031478821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131031470821) 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, 6487561 + ... + 6507726.

It is an arithmetic number, because the mean of its divisors is an integer number (21845079128).

Almost surely, 2^131031478821 is an apocalyptic number.

It is an amenable number.

131031478821 is a deficient number, since it is larger than the sum of its proper divisors (43729154203).

131031478821 is a wasteful number, since it uses less digits than its factorization.

131031478821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12998651.

The product of its (nonzero) digits is 32256, while the sum is 39.

The spelling of 131031478821 in words is "one hundred thirty-one billion, thirty-one million, four hundred seventy-eight thousand, eight hundred twenty-one".