1225400222 has 16 divisors (see below), whose sum is σ = 1947214080. Its totient is φ = 576365568.

The previous prime is 1225400219. The next prime is 1225400243. The reversal of 1225400222 is 2220045221.

It is a junction number, because it is equal to n+sod(n) for n = 1225400194 and 1225400203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68078 + ... + 84174.

It is an arithmetic number, because the mean of its divisors is an integer number (121700880).

Almost surely, 2^1225400222 is an apocalyptic number.

1225400222 is a deficient number, since it is larger than the sum of its proper divisors (721813858).

1225400222 is a wasteful number, since it uses less digits than its factorization.

1225400222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18355.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1225400222 is about 35005.7169902289. The cubic root of 1225400222 is about 1070.1039937356.

Adding to 1225400222 its reverse (2220045221), we get a palindrome (3445445443).

The spelling of 1225400222 in words is "one billion, two hundred twenty-five million, four hundred thousand, two hundred twenty-two".