2221759 has 4 divisors (see below), whose sum is σ = 2229304. Its totient is φ = 2214216.

The previous prime is 2221757. The next prime is 2221771. The reversal of 2221759 is 9571222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9571222 = 2 ⋅4785611.

It is a cyclic number.

It is not a de Polignac number, because 2221759 - 2¹ = 2221757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3312 + ... + 3925.

It is an arithmetic number, because the mean of its divisors is an integer number (557326).

2^2221759 is an apocalyptic number.

2221759 is a deficient number, since it is larger than the sum of its proper divisors (7545).

2221759 is an equidigital number, since it uses as much as digits as its factorization.

2221759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7544.

The product of its digits is 2520, while the sum is 28.

The square root of 2221759 is about 1490.5566074457. The cubic root of 2221759 is about 130.4865201404.

The spelling of 2221759 in words is "two million, two hundred twenty-one thousand, seven hundred fifty-nine".