222219638784 has 768 divisors, whose sum is σ = 782623296000. Its totient is φ = 61418373120.

The previous prime is 222219638747. The next prime is 222219638789. The reversal of 222219638784 is 487836912222.

It is a tau number, because it is divible by the number of its divisors (768).

It is a super-2 number, since 2×222219638784² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 222219638784.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222219638789) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1241450407 + ... + 1241450585.

It is an arithmetic number, because the mean of its divisors is an integer number (1019040750).

Almost surely, 2^222219638784 is an apocalyptic number.

222219638784 is a gapful number since it is divisible by the number (24) 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 222219638784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (391311648000).

222219638784 is an abundant number, since it is smaller than the sum of its proper divisors (560403657216).

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

222219638784 is a wasteful number, since it uses less digits than its factorization.

222219638784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 365 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The spelling of 222219638784 in words is "two hundred twenty-two billion, two hundred nineteen million, six hundred thirty-eight thousand, seven hundred eighty-four".