221406350 has 48 divisors (see below), whose sum is σ = 456935040. Its totient is φ = 79135200.

The previous prime is 221406343. The next prime is 221406379. The reversal of 221406350 is 53604122.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29039 + ... + 35861.

It is an arithmetic number, because the mean of its divisors is an integer number (9519480).

Almost surely, 2^221406350 is an apocalyptic number.

221406350 is an abundant number, since it is smaller than the sum of its proper divisors (235528690).

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

221406350 is a wasteful number, since it uses less digits than its factorization.

221406350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6905 (or 6900 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 221406350 is about 14879.7295002295. The cubic root of 221406350 is about 604.9646861431.

The spelling of 221406350 in words is "two hundred twenty-one million, four hundred six thousand, three hundred fifty".