2221738 has 8 divisors (see below), whose sum is σ = 3359232. Its totient is φ = 1101996.

The previous prime is 2221733. The next prime is 2221741. The reversal of 2221738 is 8371222.

2221738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2221738² = 9872239481288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2221733) 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 in 3 ways as a sum of consecutive naturals, for example, 4120 + ... + 4627.

It is an arithmetic number, because the mean of its divisors is an integer number (419904).

2^2221738 is an apocalyptic number.

2221738 is a deficient number, since it is larger than the sum of its proper divisors (1137494).

2221738 is a wasteful number, since it uses less digits than its factorization.

2221738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8876.

The product of its digits is 1344, while the sum is 25.

The square root of 2221738 is about 1490.5495630807. The cubic root of 2221738 is about 130.4861090209.

The spelling of 2221738 in words is "two million, two hundred twenty-one thousand, seven hundred thirty-eight".