221868850 has 48 divisors (see below), whose sum is σ = 487915200. Its totient is φ = 73442880.

The previous prime is 221868839. The next prime is 221868919. The reversal of 221868850 is 58868122.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 780 + ... + 21079.

It is an arithmetic number, because the mean of its divisors is an integer number (10164900).

Almost surely, 2^221868850 is an apocalyptic number.

221868850 is an abundant number, since it is smaller than the sum of its proper divisors (266046350).

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

221868850 is a wasteful number, since it uses less digits than its factorization.

221868850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21907 (or 21902 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 221868850 is about 14895.2626697215. The cubic root of 221868850 is about 605.3856339754.

The spelling of 221868850 in words is "two hundred twenty-one million, eight hundred sixty-eight thousand, eight hundred fifty".