2218312004 has 24 divisors (see below), whose sum is σ = 4064077248. Its totient is φ = 1057462560.

The previous prime is 2218312003. The next prime is 2218312087. The reversal of 2218312004 is 4002138122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (2218312003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11027 + ... + 67514.

It is an arithmetic number, because the mean of its divisors is an integer number (169336552).

Almost surely, 2^2218312004 is an apocalyptic number.

It is an amenable number.

2218312004 is a deficient number, since it is larger than the sum of its proper divisors (1845765244).

2218312004 is a wasteful number, since it uses less digits than its factorization.

2218312004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78875 (or 78873 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 2218312004 is about 47098.9596912713. The cubic root of 2218312004 is about 1304.1900316791.

The spelling of 2218312004 in words is "two billion, two hundred eighteen million, three hundred twelve thousand, four".