2145222555 has 16 divisors (see below), whose sum is σ = 3922692864. Its totient is φ = 980673120.

The previous prime is 2145222533. The next prime is 2145222577. The reversal of 2145222555 is 5552225412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2145222533) and next prime (2145222577).

It is not a de Polignac number, because 2145222555 - 2⁶ = 2145222491 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, 10215241 + ... + 10215450.

It is an arithmetic number, because the mean of its divisors is an integer number (245168304).

Almost surely, 2^2145222555 is an apocalyptic number.

2145222555 is a deficient number, since it is larger than the sum of its proper divisors (1777470309).

2145222555 is a wasteful number, since it uses less digits than its factorization.

2145222555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20430706.

The product of its digits is 40000, while the sum is 33.

The square root of 2145222555 is about 46316.5473130284. The cubic root of 2145222555 is about 1289.7061917261.

Adding to 2145222555 its reverse (5552225412), we get a palindrome (7697447967).

The spelling of 2145222555 in words is "two billion, one hundred forty-five million, two hundred twenty-two thousand, five hundred fifty-five".