55555500216831 has 8 divisors (see below), whose sum is σ = 74074039537200. Its totient is φ = 37036980520512.

The previous prime is 55555500216791. The next prime is 55555500216889. The reversal of 55555500216831 is 13861200555555.

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

It is not a de Polignac number, because 55555500216831 - 2⁶ = 55555500216767 is a prime.

It is a super-2 number, since 2×55555500216831² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55555500216431) 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, 4019245 + ... + 11281193.

It is an arithmetic number, because the mean of its divisors is an integer number (9259254942150).

Almost surely, 2^{55555500216831} is an apocalyptic number.

55555500216831 is a deficient number, since it is larger than the sum of its proper divisors (18518539320369).

55555500216831 is a wasteful number, since it uses less digits than its factorization.

55555500216831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9812025.

The product of its (nonzero) digits is 4500000, while the sum is 51.

The spelling of 55555500216831 in words is "fifty-five trillion, five hundred fifty-five billion, five hundred million, two hundred sixteen thousand, eight hundred thirty-one".