2221288 has 16 divisors (see below), whose sum is σ = 4410180. Its totient is φ = 1045248.

The previous prime is 2221273. The next prime is 2221301. The reversal of 2221288 is 8821222.

It can be written as a sum of positive squares in 2 ways, for example, as 2196324 + 24964 = 1482^2 + 158^2 .

It is a nude number because it is divisible by every one of its digits.

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, 8031 + ... + 8302.

2^2221288 is an apocalyptic number.

It is an amenable number.

2221288 is a deficient number, since it is larger than the sum of its proper divisors (2188892).

2221288 is a wasteful number, since it uses less digits than its factorization.

2221288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16356 (or 16352 counting only the distinct ones).

The product of its digits is 1024, while the sum is 25.

The square root of 2221288 is about 1490.3986044008. The cubic root of 2221288 is about 130.4772986940.

The spelling of 2221288 in words is "two million, two hundred twenty-one thousand, two hundred eighty-eight".