7722222 has 16 divisors (see below), whose sum is σ = 15472512. Its totient is φ = 2569400.

The previous prime is 7722217. The next prime is 7722229. The reversal of 7722222 is 2222277.

7722222 is a modest number, since divided by 2222 gives 772 as remainder.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 7722192 and 7722201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7722229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4597 + ... + 6047.

It is an arithmetic number, because the mean of its divisors is an integer number (967032).

Almost surely, 2^7722222 is an apocalyptic number.

7722222 is an abundant number, since it is smaller than the sum of its proper divisors (7750290).

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

7722222 is a wasteful number, since it uses less digits than its factorization.

7722222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2343.

The product of its digits is 1568, while the sum is 24.

The square root of 7722222 is about 2778.8886267715. Note that the first 3 decimals coincide. The cubic root of 7722222 is about 197.6578623567.

Adding to 7722222 its reverse (2222277), we get a palindrome (9944499).

Subtracting from 7722222 its reverse (2222277), we obtain a palindrome (5499945).

The spelling of 7722222 in words is "seven million, seven hundred twenty-two thousand, two hundred twenty-two".