10722222 has 48 divisors (see below), whose sum is σ = 27181440. Its totient is φ = 2990736.

The previous prime is 10722169. The next prime is 10722227. The reversal of 10722222 is 22222701.

It is a happy number.

It is a super-2 number, since 2×10722222² = 229932089234568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

10722222 is a modest number, since divided by 2222 gives 1072 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 10722195 and 10722204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10722227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4429 + ... + 6407.

It is an arithmetic number, because the mean of its divisors is an integer number (566280).

Almost surely, 2^10722222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10722222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13590720).

10722222 is an abundant number, since it is smaller than the sum of its proper divisors (16459218).

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

10722222 is a wasteful number, since it uses less digits than its factorization.

10722222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2037 (or 2034 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 10722222 is about 3274.4804167990. The cubic root of 10722222 is about 220.5099876698.

Adding to 10722222 its reverse (22222701), we get a palindrome (32944923).

The spelling of 10722222 in words is "ten million, seven hundred twenty-two thousand, two hundred twenty-two".