220021712 has 40 divisors (see below), whose sum is σ = 441575904. Its totient is φ = 106130304.

The previous prime is 220021651. The next prime is 220021741. The reversal of 220021712 is 217120022.

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 7 ways as a sum of consecutive naturals, for example, 55178 + ... + 59030.

Almost surely, 2^220021712 is an apocalyptic number.

It is an amenable number.

220021712 is an abundant number, since it is smaller than the sum of its proper divisors (221554192).

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

220021712 is a wasteful number, since it uses less digits than its factorization.

220021712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3987 (or 3981 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 220021712 is about 14833.1288675047. The cubic root of 220021712 is about 603.7009323045.

Adding to 220021712 its reverse (217120022), we get a palindrome (437141734).

The spelling of 220021712 in words is "two hundred twenty million, twenty-one thousand, seven hundred twelve".