2221743 has 4 divisors (see below), whose sum is σ = 2962328. Its totient is φ = 1481160.

The previous prime is 2221741. The next prime is 2221753. The reversal of 2221743 is 3471222.

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

It is not a de Polignac number, because 2221743 - 2¹ = 2221741 is a prime.

It is a super-2 number, since 2×2221743² = 9872283916098, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370288 + ... + 370293.

It is an arithmetic number, because the mean of its divisors is an integer number (740582).

2^2221743 is an apocalyptic number.

2221743 is a deficient number, since it is larger than the sum of its proper divisors (740585).

2221743 is an equidigital number, since it uses as much as digits as its factorization.

2221743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740584.

The product of its digits is 672, while the sum is 21.

The square root of 2221743 is about 1490.5512403135. The cubic root of 2221743 is about 130.4862069067.

Adding to 2221743 its reverse (3471222), we get a palindrome (5692965).

The spelling of 2221743 in words is "two million, two hundred twenty-one thousand, seven hundred forty-three".