220423556 has 12 divisors (see below), whose sum is σ = 385850892. Its totient is φ = 110180448.

The previous prime is 220423549. The next prime is 220423571. The reversal of 220423556 is 655324022.

It can be written as a sum of positive squares in 2 ways, for example, as 201640000 + 18783556 = 14200^2 + 4334^2 .

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, 16166 + ... + 26498.

It is an arithmetic number, because the mean of its divisors is an integer number (32154241).

Almost surely, 2^220423556 is an apocalyptic number.

It is an amenable number.

220423556 is a deficient number, since it is larger than the sum of its proper divisors (165427336).

220423556 is a wasteful number, since it uses less digits than its factorization.

220423556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15670 (or 15668 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 220423556 is about 14846.6681784163. The cubic root of 220423556 is about 604.0682385660.

Adding to 220423556 its reverse (655324022), we get a palindrome (875747578).

The spelling of 220423556 in words is "two hundred twenty million, four hundred twenty-three thousand, five hundred fifty-six".