221949384 has 32 divisors (see below), whose sum is σ = 569872320. Its totient is φ = 71983296.

The previous prime is 221949373. The next prime is 221949401. The reversal of 221949384 is 483949122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124084 + ... + 125859.

It is an arithmetic number, because the mean of its divisors is an integer number (17808510).

Almost surely, 2^221949384 is an apocalyptic number.

221949384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

221949384 is an abundant number, since it is smaller than the sum of its proper divisors (347922936).

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

221949384 is a wasteful number, since it uses less digits than its factorization.

221949384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249989 (or 249985 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 221949384 is about 14897.9657671777. The cubic root of 221949384 is about 605.4588727813.

The spelling of 221949384 in words is "two hundred twenty-one million, nine hundred forty-nine thousand, three hundred eighty-four".