221440030 has 32 divisors (see below), whose sum is σ = 465232896. Its totient is φ = 74305824.

The previous prime is 221440019. The next prime is 221440061. The reversal of 221440030 is 30044122.

221440030 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221439986 and 221440013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30364 + ... + 36943.

It is an arithmetic number, because the mean of its divisors is an integer number (14538528).

Almost surely, 2^221440030 is an apocalyptic number.

221440030 is an abundant number, since it is smaller than the sum of its proper divisors (243792866).

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

221440030 is a wasteful number, since it uses less digits than its factorization.

221440030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67368.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 221440030 is about 14880.8611981968. The cubic root of 221440030 is about 604.9953600263.

Adding to 221440030 its reverse (30044122), we get a palindrome (251484152).

The spelling of 221440030 in words is "two hundred twenty-one million, four hundred forty thousand, thirty".