2221545004 has 12 divisors (see below), whose sum is σ = 4443090064. Its totient is φ = 952090704.

The previous prime is 2221544977. The next prime is 2221545019. The reversal of 2221545004 is 4005451222.

2221545004 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 2221545004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39670419 + ... + 39670474.

Almost surely, 2^2221545004 is an apocalyptic number.

It is an amenable number.

2221545004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2221545004 is a wasteful number, since it uses less digits than its factorization.

2221545004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79340904 (or 79340902 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 2221545004 is about 47133.2685478103. The cubic root of 2221545004 is about 1304.8233059362.

Adding to 2221545004 its reverse (4005451222), we get a palindrome (6226996226).

The spelling of 2221545004 in words is "two billion, two hundred twenty-one million, five hundred forty-five thousand, four".