222700720 has 80 divisors (see below), whose sum is σ = 589462272. Its totient is φ = 77454080.

The previous prime is 222700693. The next prime is 222700727. The reversal of 222700720 is 27007222.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×222700720² = 99191221377036800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 222700691 and 222700700.

It is not an unprimeable number, because it can be changed into a prime (222700727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14739 + ... + 25741.

Almost surely, 2^222700720 is an apocalyptic number.

222700720 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 222700720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294731136).

222700720 is an abundant number, since it is smaller than the sum of its proper divisors (366761552).

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

222700720 is a wasteful number, since it uses less digits than its factorization.

222700720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11050 (or 11044 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 222700720 is about 14923.1605231600. The cubic root of 222700720 is about 606.1412966968.

Adding to 222700720 its reverse (27007222), we get a palindrome (249707942).

It can be divided in two parts, 2 and 22700720, that added together give a palindrome (22700722).

The spelling of 222700720 in words is "two hundred twenty-two million, seven hundred thousand, seven hundred twenty".