22506173 has 2 divisors, whose sum is σ = 22506174. Its totient is φ = 22506172.

The previous prime is 22506163. The next prime is 22506179. The reversal of 22506173 is 37160522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16345849 + 6160324 = 4043^2 + 2482^2 .

It is a cyclic number.

It is not a de Polignac number, because 22506173 - 2⁶ = 22506109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22506179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11253086 + 11253087.

It is an arithmetic number, because the mean of its divisors is an integer number (11253087).

Almost surely, 2^22506173 is an apocalyptic number.

It is an amenable number.

22506173 is a deficient number, since it is larger than the sum of its proper divisors (1).

22506173 is an equidigital number, since it uses as much as digits as its factorization.

22506173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 22506173 is about 4744.0671369617. The cubic root of 22506173 is about 282.3366241498.

Adding to 22506173 its reverse (37160522), we get a palindrome (59666695).

The spelling of 22506173 in words is "twenty-two million, five hundred six thousand, one hundred seventy-three".