22730261 has 2 divisors, whose sum is σ = 22730262. Its totient is φ = 22730260.

The previous prime is 22730249. The next prime is 22730293. The reversal of 22730261 is 16203722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16048036 + 6682225 = 4006^2 + 2585^2 .

It is a cyclic number.

It is not a de Polignac number, because 22730261 - 2¹⁰ = 22729237 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22730221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11365130 + 11365131.

It is an arithmetic number, because the mean of its divisors is an integer number (11365131).

Almost surely, 2^22730261 is an apocalyptic number.

It is an amenable number.

22730261 is a deficient number, since it is larger than the sum of its proper divisors (1).

22730261 is an equidigital number, since it uses as much as digits as its factorization.

22730261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 22730261 is about 4767.6263486142. The cubic root of 22730261 is about 283.2705815662.

Adding to 22730261 its reverse (16203722), we get a palindrome (38933983).

The spelling of 22730261 in words is "twenty-two million, seven hundred thirty thousand, two hundred sixty-one".