208242628831 has 4 divisors (see below), whose sum is σ = 208461142512. Its totient is φ = 208024115152.

The previous prime is 208242628799. The next prime is 208242628873. The reversal of 208242628831 is 138826242802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 208242628831 - 2⁵ = 208242628799 is a prime.

It is a super-2 number, since 2×208242628831² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208242628931) 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, 109255411 + ... + 109257316.

It is an arithmetic number, because the mean of its divisors is an integer number (52115285628).

Almost surely, 2^208242628831 is an apocalyptic number.

208242628831 is a deficient number, since it is larger than the sum of its proper divisors (218513681).

208242628831 is an equidigital number, since it uses as much as digits as its factorization.

208242628831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218513680.

The product of its (nonzero) digits is 589824, while the sum is 46.

The spelling of 208242628831 in words is "two hundred eight billion, two hundred forty-two million, six hundred twenty-eight thousand, eight hundred thirty-one".