222231440420 has 96 divisors (see below), whose sum is σ = 532699324416. Its totient is φ = 77086627200.

The previous prime is 222231440413. The next prime is 222231440423. The reversal of 222231440420 is 24044132222.

It is a super-2 number, since 2×222231440420² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 222231440420.

It is not an unprimeable number, because it can be changed into a prime (222231440423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1797185 + ... + 1916855.

It is an arithmetic number, because the mean of its divisors is an integer number (5548951296).

Almost surely, 2^222231440420 is an apocalyptic number.

222231440420 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 222231440420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266349662208).

222231440420 is an abundant number, since it is smaller than the sum of its proper divisors (310467883996).

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

222231440420 is a wasteful number, since it uses less digits than its factorization.

222231440420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120081 (or 120079 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 222231440420 its reverse (24044132222), we get a palindrome (246275572642).

The spelling of 222231440420 in words is "two hundred twenty-two billion, two hundred thirty-one million, four hundred forty thousand, four hundred twenty".