22208723 has 2 divisors, whose sum is σ = 22208724. Its totient is φ = 22208722.

The previous prime is 22208713. The next prime is 22208737. The reversal of 22208723 is 32780222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22208723 - 2⁴ = 22208707 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22208692 and 22208701.

It is not a weakly prime, because it can be changed into another prime (22208713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11104361 + 11104362.

It is an arithmetic number, because the mean of its divisors is an integer number (11104362).

Almost surely, 2^22208723 is an apocalyptic number.

22208723 is a deficient number, since it is larger than the sum of its proper divisors (1).

22208723 is an equidigital number, since it uses as much as digits as its factorization.

22208723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 22208723 is about 4712.6131816647. The cubic root of 22208723 is about 281.0872818111.

Adding to 22208723 its reverse (32780222), we get a palindrome (54988945).

The spelling of 22208723 in words is "twenty-two million, two hundred eight thousand, seven hundred twenty-three".