221166232 has 64 divisors (see below), whose sum is σ = 503712000. Its totient is φ = 88926336.

The previous prime is 221166223. The next prime is 221166269. The reversal of 221166232 is 232661122.

It is a junction number, because it is equal to n+sod(n) for n = 221166197 and 221166206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115023 + ... + 116929.

It is an arithmetic number, because the mean of its divisors is an integer number (7870500).

Almost surely, 2^221166232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221166232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251856000).

221166232 is an abundant number, since it is smaller than the sum of its proper divisors (282545768).

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

221166232 is a wasteful number, since it uses less digits than its factorization.

221166232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2048 (or 2044 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 221166232 is about 14871.6586835497. The cubic root of 221166232 is about 604.7459097390.

The spelling of 221166232 in words is "two hundred twenty-one million, one hundred sixty-six thousand, two hundred thirty-two".