22122722 has 8 divisors (see below), whose sum is σ = 33240576. Its totient is φ = 11042532.

The previous prime is 22122719. The next prime is 22122731. The reversal of 22122722 is 22722122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 22122694 and 22122703.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7898 + ... + 10325.

It is an arithmetic number, because the mean of its divisors is an integer number (4155072).

Almost surely, 2^22122722 is an apocalyptic number.

22122722 is a deficient number, since it is larger than the sum of its proper divisors (11117854).

22122722 is a wasteful number, since it uses less digits than its factorization.

22122722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18832.

The product of its digits is 448, while the sum is 20.

The square root of 22122722 is about 4703.4797756555. The cubic root of 22122722 is about 280.7239852492.

Adding to 22122722 its reverse (22722122), we get a palindrome (44844844).

The spelling of 22122722 in words is "twenty-two million, one hundred twenty-two thousand, seven hundred twenty-two".