2222255556 has 18 divisors (see below), whose sum is σ = 5617368302. Its totient is φ = 740751840.

The previous prime is 2222255533. The next prime is 2222255579. The reversal of 2222255556 is 6555522222.

It is an interprime number because it is at equal distance from previous prime (2222255533) and next prime (2222255579).

It can be written as a sum of positive squares in only one way, i.e., 1378933956 + 843321600 = 37134^2 + 29040^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 61729321 = 2222255556 / (2 + 2 + 2 + 2 + 2 + 5 + 5 + 5 + 5 + 6).

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 2222255556.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30864625 + ... + 30864696.

Almost surely, 2^2222255556 is an apocalyptic number.

It is an amenable number.

2222255556 is an abundant number, since it is smaller than the sum of its proper divisors (3395112746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2222255556 is a wasteful number, since it uses less digits than its factorization.

2222255556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61729331 (or 61729326 counting only the distinct ones).

The product of its digits is 120000, while the sum is 36.

The square root of 2222255556 is about 47140.8056358820. The cubic root of 2222255556 is about 1304.9624052234.

Adding to 2222255556 its reverse (6555522222), we get a palindrome (8777777778).

The spelling of 2222255556 in words is "two billion, two hundred twenty-two million, two hundred fifty-five thousand, five hundred fifty-six".