221885748 has 72 divisors (see below), whose sum is σ = 645782592. Its totient is φ = 62923392.

The previous prime is 221885747. The next prime is 221885753. The reversal of 221885748 is 847588122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221885747) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31311 + ... + 37737.

Almost surely, 2^221885748 is an apocalyptic number.

221885748 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 221885748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322891296).

221885748 is an abundant number, since it is smaller than the sum of its proper divisors (423896844).

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

221885748 is a wasteful number, since it uses less digits than its factorization.

221885748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6581 (or 6576 counting only the distinct ones).

The product of its digits is 286720, while the sum is 45.

The square root of 221885748 is about 14895.8298862467. The cubic root of 221885748 is about 605.4010027345.

The spelling of 221885748 in words is "two hundred twenty-one million, eight hundred eighty-five thousand, seven hundred forty-eight".