221341992 has 64 divisors (see below), whose sum is σ = 579156480. Its totient is φ = 70417152.

The previous prime is 221341973. The next prime is 221341997. The reversal of 221341992 is 299143122.

It is not an unprimeable number, because it can be changed into a prime (221341997) 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, 44713 + ... + 49415.

It is an arithmetic number, because the mean of its divisors is an integer number (9049320).

Almost surely, 2^221341992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221341992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289578240).

221341992 is an abundant number, since it is smaller than the sum of its proper divisors (357814488).

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

221341992 is a wasteful number, since it uses less digits than its factorization.

221341992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4802 (or 4798 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 221341992 is about 14877.5667365332. The cubic root of 221341992 is about 604.9060637800.

The spelling of 221341992 in words is "two hundred twenty-one million, three hundred forty-one thousand, nine hundred ninety-two".