218205422 has 8 divisors (see below), whose sum is σ = 327559872. Its totient is φ = 109018800.

The previous prime is 218205401. The next prime is 218205433. The reversal of 218205422 is 224502812.

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

It is a super-2 number, since 2×218205422² = 95227212380396168, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 218205391 and 218205400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38654 + ... + 43937.

It is an arithmetic number, because the mean of its divisors is an integer number (40944984).

Almost surely, 2^218205422 is an apocalyptic number.

218205422 is a deficient number, since it is larger than the sum of its proper divisors (109354450).

218205422 is a wasteful number, since it uses less digits than its factorization.

218205422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83914.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 218205422 is about 14771.7778889340. Note that the first 3 decimals coincide. The cubic root of 218205422 is about 602.0351465667.

The spelling of 218205422 in words is "two hundred eighteen million, two hundred five thousand, four hundred twenty-two".