221313104436 has 96 divisors (see below), whose sum is σ = 561076129152. Its totient is φ = 67621212160.

The previous prime is 221313104417. The next prime is 221313104461. The reversal of 221313104436 is 634401313122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4887130 + ... + 4932206.

It is an arithmetic number, because the mean of its divisors is an integer number (5844543012).

Almost surely, 2^221313104436 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 221313104436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280538064576).

221313104436 is an abundant number, since it is smaller than the sum of its proper divisors (339763024716).

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

221313104436 is a wasteful number, since it uses less digits than its factorization.

221313104436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45729 (or 45727 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 221313104436 its reverse (634401313122), we get a palindrome (855714417558).

The spelling of 221313104436 in words is "two hundred twenty-one billion, three hundred thirteen million, one hundred four thousand, four hundred thirty-six".