221647230 has 96 divisors (see below), whose sum is σ = 674751168. Its totient is φ = 49420800.

The previous prime is 221647213. The next prime is 221647273. The reversal of 221647230 is 32746122.

It is a junction number, because it is equal to n+sod(n) for n = 221647194 and 221647203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21540 + ... + 30120.

It is an arithmetic number, because the mean of its divisors is an integer number (7028658).

Almost surely, 2^221647230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221647230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337375584).

221647230 is an abundant number, since it is smaller than the sum of its proper divisors (453103938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221647230 is a wasteful number, since it uses less digits than its factorization.

221647230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8642 (or 8639 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 221647230 is about 14887.8215330518. The cubic root of 221647230 is about 605.1839979478.

The spelling of 221647230 in words is "two hundred twenty-one million, six hundred forty-seven thousand, two hundred thirty".