1225222213 has 16 divisors (see below), whose sum is σ = 1301630976. Its totient is φ = 1150934400.

The previous prime is 1225222211. The next prime is 1225222223. The reversal of 1225222213 is 3122225221.

It is a cyclic number.

It is not a de Polignac number, because 1225222213 - 2¹ = 1225222211 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 (1225222211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 292945 + ... + 297097.

It is an arithmetic number, because the mean of its divisors is an integer number (81351936).

Almost surely, 2^1225222213 is an apocalyptic number.

It is an amenable number.

1225222213 is a deficient number, since it is larger than the sum of its proper divisors (76408763).

1225222213 is a wasteful number, since it uses less digits than its factorization.

1225222213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4404.

The product of its digits is 960, while the sum is 22.

The square root of 1225222213 is about 35003.1743274806. The cubic root of 1225222213 is about 1070.0521746475.

Adding to 1225222213 its reverse (3122225221), we get a palindrome (4347447434).

The spelling of 1225222213 in words is "one billion, two hundred twenty-five million, two hundred twenty-two thousand, two hundred thirteen".