221026032 has 120 divisors (see below), whose sum is σ = 648926720. Its totient is φ = 70139520.

The previous prime is 221026019. The next prime is 221026033. The reversal of 221026032 is 230620122.

221026032 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221025996 and 221026014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221026033) 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, 298719 + ... + 299457.

Almost surely, 2^221026032 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 221026032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324463360).

221026032 is an abundant number, since it is smaller than the sum of its proper divisors (427900688).

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

221026032 is a wasteful number, since it uses less digits than its factorization.

221026032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851 (or 842 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 221026032 is about 14866.9442724455. The cubic root of 221026032 is about 604.6180974330.

Adding to 221026032 its reverse (230620122), we get a palindrome (451646154).

The spelling of 221026032 in words is "two hundred twenty-one million, twenty-six thousand, thirty-two".