1322220225 has 12 divisors (see below), whose sum is σ = 2186070896. Its totient is φ = 705184080.

The previous prime is 1322220173. The next prime is 1322220227. The reversal of 1322220225 is 5220222231.

It is not a de Polignac number, because 1322220225 - 2⁶ = 1322220161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1322220227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8814727 + ... + 8814876.

Almost surely, 2^1322220225 is an apocalyptic number.

1322220225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1322220225 is a deficient number, since it is larger than the sum of its proper divisors (863850671).

1322220225 is a wasteful number, since it uses less digits than its factorization.

1322220225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17629616 (or 17629611 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 1322220225 is about 36362.3462526829. The cubic root of 1322220225 is about 1097.5759914727.

Adding to 1322220225 its reverse (5220222231), we get a palindrome (6542442456).

The spelling of 1322220225 in words is "one billion, three hundred twenty-two million, two hundred twenty thousand, two hundred twenty-five".