220471228 has 6 divisors (see below), whose sum is σ = 385824656. Its totient is φ = 110235612.

The previous prime is 220471217. The next prime is 220471243. The reversal of 220471228 is 822174022.

It is a junction number, because it is equal to n+sod(n) for n = 220471196 and 220471205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27558900 + ... + 27558907.

Almost surely, 2^220471228 is an apocalyptic number.

It is an amenable number.

220471228 is a deficient number, since it is larger than the sum of its proper divisors (165353428).

220471228 is a wasteful number, since it uses less digits than its factorization.

220471228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55117811 (or 55117809 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 220471228 is about 14848.2735696781. The cubic root of 220471228 is about 604.1117836175. Note that the first 3 decimals are identical.

The spelling of 220471228 in words is "two hundred twenty million, four hundred seventy-one thousand, two hundred twenty-eight".