2218578146 has 16 divisors (see below), whose sum is σ = 3352476600. Its totient is φ = 1101112320.

The previous prime is 2218578107. The next prime is 2218578181. The reversal of 2218578146 is 6418758122.

It can be written as a sum of positive squares in 4 ways, for example, as 2140450225 + 78127921 = 46265^2 + 8839^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2218578097 and 2218578106.

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 7 ways as a sum of consecutive naturals, for example, 170636 + ... + 183176.

Almost surely, 2^2218578146 is an apocalyptic number.

2218578146 is a deficient number, since it is larger than the sum of its proper divisors (1133898454).

2218578146 is a wasteful number, since it uses less digits than its factorization.

2218578146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13189.

The product of its digits is 215040, while the sum is 44.

The square root of 2218578146 is about 47101.7849555619. The cubic root of 2218578146 is about 1304.2421863298.

The spelling of 2218578146 in words is "two billion, two hundred eighteen million, five hundred seventy-eight thousand, one hundred forty-six".