220400212 has 12 divisors (see below), whose sum is σ = 386958880. Its totient is φ = 109840536.

The previous prime is 220400177. The next prime is 220400227. The reversal of 220400212 is 212004022.

It is a junction number, because it is equal to n+sod(n) for n = 220400192 and 220400201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88512 + ... + 90967.

Almost surely, 2^220400212 is an apocalyptic number.

It is an amenable number.

220400212 is a deficient number, since it is larger than the sum of its proper divisors (166558668).

220400212 is a wasteful number, since it uses less digits than its factorization.

220400212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179790 (or 179788 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 220400212 is about 14845.8819879453. The cubic root of 220400212 is about 604.0469131580.

Adding to 220400212 its reverse (212004022), we get a palindrome (432404234).

The spelling of 220400212 in words is "two hundred twenty million, four hundred thousand, two hundred twelve".