221440444340 has 48 divisors (see below), whose sum is σ = 480721350144. Its totient is φ = 85594665600.

The previous prime is 221440444307. The next prime is 221440444373. The reversal of 221440444340 is 43444044122.

221440444340 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (221440444307) and next prime (221440444373).

It is a junction number, because it is equal to n+sod(n) for n = 221440444297 and 221440444306.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169982 + ... + 686858.

It is an arithmetic number, because the mean of its divisors is an integer number (10015028128).

Almost surely, 2^221440444340 is an apocalyptic number.

221440444340 is a gapful number since it is divisible by the number (20) 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 221440444340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240360675072).

221440444340 is an abundant number, since it is smaller than the sum of its proper divisors (259280905804).

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

221440444340 is a wasteful number, since it uses less digits than its factorization.

221440444340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517608 (or 517606 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 221440444340 its reverse (43444044122), we get a palindrome (264884488462).

The spelling of 221440444340 in words is "two hundred twenty-one billion, four hundred forty million, four hundred forty-four thousand, three hundred forty".