221995704 has 64 divisors (see below), whose sum is σ = 637021440. Its totient is φ = 63152640.

The previous prime is 221995703. The next prime is 221995721. The reversal of 221995704 is 407599122.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221995703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37747 + ... + 43229.

It is an arithmetic number, because the mean of its divisors is an integer number (9953460).

Almost surely, 2^221995704 is an apocalyptic number.

221995704 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 221995704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318510720).

221995704 is an abundant number, since it is smaller than the sum of its proper divisors (415025736).

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

221995704 is a wasteful number, since it uses less digits than its factorization.

221995704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5740 (or 5736 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 221995704 is about 14899.5202607332. The cubic root of 221995704 is about 605.5009888466.

The spelling of 221995704 in words is "two hundred twenty-one million, nine hundred ninety-five thousand, seven hundred four".