1213224225 has 12 divisors (see below), whose sum is σ = 2005864176. Its totient is φ = 647052880.

The previous prime is 1213224209. The next prime is 1213224239. The reversal of 1213224225 is 5224223121.

It is not a de Polignac number, because 1213224225 - 2⁴ = 1213224209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213224195 and 1213224204.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8088087 + ... + 8088236.

It is an arithmetic number, because the mean of its divisors is an integer number (167155348).

Almost surely, 2^1213224225 is an apocalyptic number.

1213224225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1213224225 is a deficient number, since it is larger than the sum of its proper divisors (792639951).

1213224225 is a wasteful number, since it uses less digits than its factorization.

1213224225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16176336 (or 16176331 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 1213224225 is about 34831.3684055048. The cubic root of 1213224225 is about 1066.5478825518.

Adding to 1213224225 its reverse (5224223121), we get a palindrome (6437447346).

The spelling of 1213224225 in words is "one billion, two hundred thirteen million, two hundred twenty-four thousand, two hundred twenty-five".