222016021780 has 216 divisors, whose sum is σ = 556643840256. Its totient is φ = 74161584000.

The previous prime is 222016021757. The next prime is 222016021793. The reversal of 222016021780 is 87120610222.

It is a happy number.

222016021780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×222016021780² (a number of 23 digits) contains 22 as substring.

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 71 ways as a sum of consecutive naturals, for example, 515118165 + ... + 515118595.

It is an arithmetic number, because the mean of its divisors is an integer number (2577054816).

Almost surely, 2^222016021780 is an apocalyptic number.

222016021780 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 222016021780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278321920128).

222016021780 is an abundant number, since it is smaller than the sum of its proper divisors (334627818476).

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

222016021780 is a wasteful number, since it uses less digits than its factorization.

222016021780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723 (or 655 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The spelling of 222016021780 in words is "two hundred twenty-two billion, sixteen million, twenty-one thousand, seven hundred eighty".