221926912 has 40 divisors (see below), whose sum is σ = 447042816. Its totient is φ = 110057472.

The previous prime is 221926889. The next prime is 221926919. The reversal of 221926912 is 219629122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221926919) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 63318 + ... + 66730.

Almost surely, 2^221926912 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 221926912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223521408).

221926912 is an abundant number, since it is smaller than the sum of its proper divisors (225115904).

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

221926912 is an equidigital number, since it uses as much as digits as its factorization.

221926912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3558 (or 3542 counting only the distinct ones).

The product of its digits is 7776, while the sum is 34.

The square root of 221926912 is about 14897.2115511595. The cubic root of 221926912 is about 605.4384381958.

The spelling of 221926912 in words is "two hundred twenty-one million, nine hundred twenty-six thousand, nine hundred twelve".