2221838 has 4 divisors (see below), whose sum is σ = 3332760. Its totient is φ = 1110918.

The previous prime is 2221837. The next prime is 2221847. The reversal of 2221838 is 8381222.

2221838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a d-powerful number, because it can be written as 2² + 2⁵ + 2¹⁶ + 1 + 8² + 3¹⁰ + 8⁷ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555458 + ... + 555461.

It is an arithmetic number, because the mean of its divisors is an integer number (833190).

2^2221838 is an apocalyptic number.

2221838 is a deficient number, since it is larger than the sum of its proper divisors (1110922).

2221838 is a wasteful number, since it uses less digits than its factorization.

2221838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110921.

The product of its digits is 1536, while the sum is 26.

The square root of 2221838 is about 1490.5831073778. The cubic root of 2221838 is about 130.4880667097.

The spelling of 2221838 in words is "two million, two hundred twenty-one thousand, eight hundred thirty-eight".