221383708 has 48 divisors (see below), whose sum is σ = 478051840. Its totient is φ = 87355584.

The previous prime is 221383697. The next prime is 221383711. The reversal of 221383708 is 807383122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268585 + ... + 269407.

Almost surely, 2^221383708 is an apocalyptic number.

221383708 is a gapful number since it is divisible by the number (28) 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 221383708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239025920).

221383708 is an abundant number, since it is smaller than the sum of its proper divisors (256668132).

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

221383708 is a wasteful number, since it uses less digits than its factorization.

221383708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586 (or 1584 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 221383708 is about 14878.9686470535. The cubic root of 221383708 is about 604.9440633119.

The spelling of 221383708 in words is "two hundred twenty-one million, three hundred eighty-three thousand, seven hundred eight".