221123384 has 8 divisors (see below), whose sum is σ = 414606360. Its totient is φ = 110561688.

The previous prime is 221123363. The next prime is 221123393. The reversal of 221123384 is 483321122.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×221123384² = 97791101903222912, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 13820204 + ... + 13820219.

It is an arithmetic number, because the mean of its divisors is an integer number (51825795).

Almost surely, 2^221123384 is an apocalyptic number.

It is an amenable number.

221123384 is a deficient number, since it is larger than the sum of its proper divisors (193482976).

221123384 is a wasteful number, since it uses less digits than its factorization.

221123384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27640429 (or 27640425 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 221123384 is about 14870.2180212665. The cubic root of 221123384 is about 604.7068534056.

The spelling of 221123384 in words is "two hundred twenty-one million, one hundred twenty-three thousand, three hundred eighty-four".