208445983213 has 4 divisors (see below), whose sum is σ = 224480289628. Its totient is φ = 192411676800.

The previous prime is 208445983201. The next prime is 208445983241. The reversal of 208445983213 is 312389544802.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312389544802 = 2 ⋅156194772401.

It can be written as a sum of positive squares in 2 ways, for example, as 118252078884 + 90193904329 = 343878^2 + 300323^2 .

It is a cyclic number.

It is not a de Polignac number, because 208445983213 - 2⁵ = 208445983181 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 (208445983243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8017153188 + ... + 8017153213.

It is an arithmetic number, because the mean of its divisors is an integer number (56120072407).

Almost surely, 2^208445983213 is an apocalyptic number.

It is an amenable number.

208445983213 is a deficient number, since it is larger than the sum of its proper divisors (16034306415).

208445983213 is a wasteful number, since it uses less digits than its factorization.

208445983213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16034306414.

The product of its (nonzero) digits is 1658880, while the sum is 49.

The spelling of 208445983213 in words is "two hundred eight billion, four hundred forty-five million, nine hundred eighty-three thousand, two hundred thirteen".