221873850 has 192 divisors, whose sum is σ = 679956480. Its totient is φ = 52747200.

The previous prime is 221873843. The next prime is 221873879. The reversal of 221873850 is 58378122.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 994839 + ... + 995061.

It is an arithmetic number, because the mean of its divisors is an integer number (3541440).

Almost surely, 2^221873850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221873850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339978240).

221873850 is an abundant number, since it is smaller than the sum of its proper divisors (458082630).

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

221873850 is a wasteful number, since it uses less digits than its factorization.

221873850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 221873850 is about 14895.4305073737. The cubic root of 221873850 is about 605.3901815650.

The spelling of 221873850 in words is "two hundred twenty-one million, eight hundred seventy-three thousand, eight hundred fifty".