221373384 has 64 divisors (see below), whose sum is σ = 568339200. Its totient is φ = 71821824.

The previous prime is 221373379. The next prime is 221373403. The reversal of 221373384 is 483373122.

221373384 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221373384² = 98012350287222912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257884 + ... + 258740.

It is an arithmetic number, because the mean of its divisors is an integer number (8880300).

Almost surely, 2^221373384 is an apocalyptic number.

221373384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221373384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284169600).

221373384 is an abundant number, since it is smaller than the sum of its proper divisors (346965816).

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

221373384 is a wasteful number, since it uses less digits than its factorization.

221373384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142 (or 1138 counting only the distinct ones).

The product of its digits is 24192, while the sum is 33.

The square root of 221373384 is about 14878.6217103601. The cubic root of 221373384 is about 604.9346595190.

The spelling of 221373384 in words is "two hundred twenty-one million, three hundred seventy-three thousand, three hundred eighty-four".