220506556 has 12 divisors (see below), whose sum is σ = 386072568. Its totient is φ = 110200112.

The previous prime is 220506547. The next prime is 220506577. The reversal of 220506556 is 655605022.

220506556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×220506556² = 97246282477962272, which contains 22 as substring.

It is a congruent number.

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, 3091 + ... + 21226.

It is an arithmetic number, because the mean of its divisors is an integer number (32172714).

Almost surely, 2^220506556 is an apocalyptic number.

It is an amenable number.

220506556 is a deficient number, since it is larger than the sum of its proper divisors (165566012).

220506556 is a wasteful number, since it uses less digits than its factorization.

220506556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26588 (or 26586 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 220506556 is about 14849.4631552794. The cubic root of 220506556 is about 604.1440492355.

The spelling of 220506556 in words is "two hundred twenty million, five hundred six thousand, five hundred fifty-six".