220556656 has 20 divisors (see below), whose sum is σ = 427707000. Its totient is φ = 110180672.

The previous prime is 220556641. The next prime is 220556659. The reversal of 220556656 is 656655022.

220556656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220556659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14670 + ... + 25618.

It is an arithmetic number, because the mean of its divisors is an integer number (21385350).

Almost surely, 2^220556656 is an apocalyptic number.

It is an amenable number.

220556656 is a deficient number, since it is larger than the sum of its proper divisors (207150344).

220556656 is a wasteful number, since it uses less digits than its factorization.

220556656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12216 (or 12210 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 220556656 is about 14851.1499891423. The cubic root of 220556656 is about 604.1898004449.

The spelling of 220556656 in words is "two hundred twenty million, five hundred fifty-six thousand, six hundred fifty-six".