2223855945 has 16 divisors (see below), whose sum is σ = 3953521920. Its totient is φ = 1186056432.

The previous prime is 2223855937. The next prime is 2223855961. The reversal of 2223855945 is 5495583222.

2223855945 is a `hidden beast` number, since 2 + 22 + 38 + 5 + 594 + 5 = 666.

It is not a de Polignac number, because 2223855945 - 2³ = 2223855937 is a prime.

It is a super-2 number, since 2×2223855945² = 9891070528223686050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2223855945.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8236369 + ... + 8236638.

It is an arithmetic number, because the mean of its divisors is an integer number (247095120).

Almost surely, 2^2223855945 is an apocalyptic number.

It is an amenable number.

2223855945 is a deficient number, since it is larger than the sum of its proper divisors (1729665975).

2223855945 is a wasteful number, since it uses less digits than its factorization.

2223855945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16473021 (or 16473015 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The square root of 2223855945 is about 47157.7771422700. Note that the first 3 decimals coincide. The cubic root of 2223855945 is about 1305.2755924761.

The spelling of 2223855945 in words is "two billion, two hundred twenty-three million, eight hundred fifty-five thousand, nine hundred forty-five".