22865261 has 2 divisors, whose sum is σ = 22865262. Its totient is φ = 22865260.

The previous prime is 22865239. The next prime is 22865263. The reversal of 22865261 is 16256822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14969161 + 7896100 = 3869^2 + 2810^2 .

It is a cyclic number.

It is not a de Polignac number, because 22865261 - 2¹⁴ = 22848877 is a prime.

It is a Sophie Germain prime.

Together with 22865263, it forms a pair of twin primes.

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 (22865263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11432630 + 11432631.

It is an arithmetic number, because the mean of its divisors is an integer number (11432631).

Almost surely, 2^22865261 is an apocalyptic number.

It is an amenable number.

22865261 is a deficient number, since it is larger than the sum of its proper divisors (1).

22865261 is an equidigital number, since it uses as much as digits as its factorization.

22865261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 32.

The square root of 22865261 is about 4781.7633776673. The cubic root of 22865261 is about 283.8302769881.

The spelling of 22865261 in words is "twenty-two million, eight hundred sixty-five thousand, two hundred sixty-one".