5550431131991 has 8 divisors (see below), whose sum is σ = 5553973851504. Its totient is φ = 5546888648640.

The previous prime is 5550431131961. The next prime is 5550431132027. The reversal of 5550431131991 is 1991311340555.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5550431131991 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 (5550431131961) 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, 86083721 + ... + 86148173.

It is an arithmetic number, because the mean of its divisors is an integer number (694246731438).

Almost surely, 2^{5550431131991} is an apocalyptic number.

5550431131991 is a deficient number, since it is larger than the sum of its proper divisors (3542719513).

5550431131991 is a wasteful number, since it uses less digits than its factorization.

5550431131991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118081.

The product of its (nonzero) digits is 364500, while the sum is 47.

The spelling of 5550431131991 in words is "five trillion, five hundred fifty billion, four hundred thirty-one million, one hundred thirty-one thousand, nine hundred ninety-one".