1223205225 has 48 divisors (see below), whose sum is σ = 2225911104. Its totient is φ = 587776000.

The previous prime is 1223205197. The next prime is 1223205227. The reversal of 1223205225 is 5225023221.

It is not a de Polignac number, because 1223205225 - 2¹⁸ = 1222943081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1223205195 and 1223205204.

It is not an unprimeable number, because it can be changed into a prime (1223205227) 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 in 47 ways as a sum of consecutive naturals, for example, 86665 + ... + 99785.

It is an arithmetic number, because the mean of its divisors is an integer number (46373148).

Almost surely, 2^1223205225 is an apocalyptic number.

1223205225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1223205225 is a deficient number, since it is larger than the sum of its proper divisors (1002705879).

1223205225 is a wasteful number, since it uses less digits than its factorization.

1223205225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13258 (or 13253 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 1223205225 is about 34974.3509589528. The cubic root of 1223205225 is about 1069.4646709292.

Adding to 1223205225 its reverse (5225023221), we get a palindrome (6448228446).

The spelling of 1223205225 in words is "one billion, two hundred twenty-three million, two hundred five thousand, two hundred twenty-five".