221979755088 has 240 divisors, whose sum is σ = 783247535616. Its totient is φ = 57116067840.

The previous prime is 221979755087. The next prime is 221979755113. The reversal of 221979755088 is 880557979122.

221979755088 is a `hidden beast` number, since 2 + 2 + 1 + 9 + 79 + 7 + 550 + 8 + 8 = 666.

221979755088 is digitally balanced in base 3, 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 (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221979755087) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 330681 + ... + 743847.

Almost surely, 2^221979755088 is an apocalyptic number.

221979755088 is a gapful number since it is divisible by the number (28) 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 221979755088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (391623767808).

221979755088 is an abundant number, since it is smaller than the sum of its proper divisors (561267780528).

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

221979755088 is a wasteful number, since it uses less digits than its factorization.

221979755088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413242 (or 413233 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 63.

The spelling of 221979755088 in words is "two hundred twenty-one billion, nine hundred seventy-nine million, seven hundred fifty-five thousand, eighty-eight".