220712 has 16 divisors (see below), whose sum is σ = 423360. Its totient is φ = 107824.

The previous prime is 220709. The next prime is 220721. The reversal of 220712 is 217022.

220712 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83 + ... + 669.

It is an arithmetic number, because the mean of its divisors is an integer number (26460).

2²²⁰⁷¹² is an apocalyptic number.

It is an amenable number.

220712 is a deficient number, since it is larger than the sum of its proper divisors (202648).

220712 is a wasteful number, since it uses less digits than its factorization.

220712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640 (or 636 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 220712 is about 469.7999574287. The cubic root of 220712 is about 60.4331616211.

Adding to 220712 its reverse (217022), we get a palindrome (437734).

The spelling of 220712 in words is "two hundred twenty thousand, seven hundred twelve", and thus it is an iban number.