220421224 has 8 divisors (see below), whose sum is σ = 413289810. Its totient is φ = 110210608.

The previous prime is 220421197. The next prime is 220421281. The reversal of 220421224 is 422124022.

It can be written as a sum of positive squares in only one way, i.e., 209728324 + 10692900 = 14482^2 + 3270^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 13776319 + ... + 13776334.

Almost surely, 2^220421224 is an apocalyptic number.

It is an amenable number.

220421224 is a deficient number, since it is larger than the sum of its proper divisors (192868586).

220421224 is a wasteful number, since it uses less digits than its factorization.

220421224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27552659 (or 27552655 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 220421224 is about 14846.5896420693. The cubic root of 220421224 is about 604.0661082854.

Adding to 220421224 its reverse (422124022), we get a palindrome (642545246).

The spelling of 220421224 in words is "two hundred twenty million, four hundred twenty-one thousand, two hundred twenty-four".