1223025566 has 8 divisors (see below), whose sum is σ = 2096615280. Its totient is φ = 524153808.

The previous prime is 1223025533. The next prime is 1223025589. The reversal of 1223025566 is 6655203221.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43679471 + ... + 43679498.

It is an arithmetic number, because the mean of its divisors is an integer number (262076910).

Almost surely, 2^1223025566 is an apocalyptic number.

1223025566 is a deficient number, since it is larger than the sum of its proper divisors (873589714).

1223025566 is an equidigital number, since it uses as much as digits as its factorization.

1223025566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87358978.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 1223025566 is about 34971.7824252639. The cubic root of 1223025566 is about 1069.4123089442.

Adding to 1223025566 its reverse (6655203221), we get a palindrome (7878228787).

The spelling of 1223025566 in words is "one billion, two hundred twenty-three million, twenty-five thousand, five hundred sixty-six".