2220400555 has 8 divisors (see below), whose sum is σ = 2721172032. Its totient is φ = 1738526208.

The previous prime is 2220400531. The next prime is 2220400571. The reversal of 2220400555 is 5550040222.

It is a happy number.

2220400555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2220400555 - 2⁹ = 2220400043 is a prime.

It is a Duffinian 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, 4724022 + ... + 4724491.

It is an arithmetic number, because the mean of its divisors is an integer number (340146504).

Almost surely, 2^2220400555 is an apocalyptic number.

2220400555 is a deficient number, since it is larger than the sum of its proper divisors (500771477).

2220400555 is an equidigital number, since it uses as much as digits as its factorization.

2220400555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9448565.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 2220400555 is about 47121.1264190490. The cubic root of 2220400555 is about 1304.5992036068.

Adding to 2220400555 its reverse (5550040222), we get a palindrome (7770440777).

The spelling of 2220400555 in words is "two billion, two hundred twenty million, four hundred thousand, five hundred fifty-five".