1222025555 has 16 divisors (see below), whose sum is σ = 1477206720. Its totient is φ = 970464768.

The previous prime is 1222025543. The next prime is 1222025579. The reversal of 1222025555 is 5555202221.

It is a cyclic number.

It is not a de Polignac number, because 1222025555 - 2¹⁴ = 1222009171 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 410111 + ... + 413079.

It is an arithmetic number, because the mean of its divisors is an integer number (92325420).

Almost surely, 2^1222025555 is an apocalyptic number.

1222025555 is a deficient number, since it is larger than the sum of its proper divisors (255181165).

1222025555 is a wasteful number, since it uses less digits than its factorization.

1222025555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3550.

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 1222025555 is about 34957.4821032637. The cubic root of 1222025555 is about 1069.1207599345.

Adding to 1222025555 its reverse (5555202221), we get a palindrome (6777227776).

The spelling of 1222025555 in words is "one billion, two hundred twenty-two million, twenty-five thousand, five hundred fifty-five".