1223020255 has 4 divisors (see below), whose sum is σ = 1467624312. Its totient is φ = 978416200.

The previous prime is 1223020247. The next prime is 1223020259. The reversal of 1223020255 is 5520203221.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1223020255 - 2³ = 1223020247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223020259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122302021 + ... + 122302030.

It is an arithmetic number, because the mean of its divisors is an integer number (366906078).

Almost surely, 2^1223020255 is an apocalyptic number.

1223020255 is a deficient number, since it is larger than the sum of its proper divisors (244604057).

1223020255 is an equidigital number, since it uses as much as digits as its factorization.

1223020255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244604056.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 1223020255 is about 34971.7064925348. The cubic root of 1223020255 is about 1069.4107609643.

Adding to 1223020255 its reverse (5520203221), we get a palindrome (6743223476).

The spelling of 1223020255 in words is "one billion, two hundred twenty-three million, twenty thousand, two hundred fifty-five".