218103808 has 50 divisors (see below), whose sum is σ = 469762034. Its totient is φ = 100663296.

The previous prime is 218103799. The next prime is 218103811. The reversal of 218103808 is 808301812.

It can be written as a sum of positive squares in only one way, i.e., 150994944 + 67108864 = 12288^2 + 8192^2 .

It is a nialpdrome in base 4 and base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 218103808.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16777210 + ... + 16777222.

Almost surely, 2^218103808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 218103808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234881017).

218103808 is an abundant number, since it is smaller than the sum of its proper divisors (251658226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218103808 is an frugal number, since it uses more digits than its factorization.

218103808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61 (or 15 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 218103808 is about 14768.3380243005. The cubic root of 218103808 is about 601.9416800565.

The spelling of 218103808 in words is "two hundred eighteen million, one hundred three thousand, eight hundred eight".