2228919945 has 32 divisors (see below), whose sum is σ = 4079861760. Its totient is φ = 1017904320.

The previous prime is 2228919937. The next prime is 2228919967. The reversal of 2228919945 is 5499198222.

It is not a de Polignac number, because 2228919945 - 2³ = 2228919937 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98880 + ... + 119310.

It is an arithmetic number, because the mean of its divisors is an integer number (127495680).

Almost surely, 2^2228919945 is an apocalyptic number.

It is an amenable number.

2228919945 is a deficient number, since it is larger than the sum of its proper divisors (1850941815).

2228919945 is a wasteful number, since it uses less digits than its factorization.

2228919945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21485.

The product of its digits is 933120, while the sum is 51.

The square root of 2228919945 is about 47211.4387092789. The cubic root of 2228919945 is about 1306.2656003570.

The spelling of 2228919945 in words is "two billion, two hundred twenty-eight million, nine hundred nineteen thousand, nine hundred forty-five".