220912 has 10 divisors (see below), whose sum is σ = 428048. Its totient is φ = 110448.

The previous prime is 220907. The next prime is 220919. The reversal of 220912 is 219022.

It is a happy number.

It is a super-2 number, since 2×220912² = 97604223488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 13807 = 220912 / (2 + 2 + 0 + 9 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220919) by changing a digit.

220912 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 as a sum of consecutive naturals, namely, 6888 + ... + 6919.

2²²⁰⁹¹² is an apocalyptic number.

It is an amenable number.

220912 is a deficient number, since it is larger than the sum of its proper divisors (207136).

220912 is a wasteful number, since it uses less digits than its factorization.

220912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13815 (or 13809 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 220912 is about 470.0127657841. The cubic root of 220912 is about 60.4514101129.

Adding to 220912 its reverse (219022), we get a palindrome (439934).

The spelling of 220912 in words is "two hundred twenty thousand, nine hundred twelve".