2600221 has 4 divisors (see below), whose sum is σ = 2800252. Its totient is φ = 2400192.

The previous prime is 2600209. The next prime is 2600231. The reversal of 2600221 is 1220062.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1220062 = 2 ⋅610031.

It can be written as a sum of positive squares in 2 ways, for example, as 308025 + 2292196 = 555^2 + 1514^2 .

It is a cyclic number.

It is not a de Polignac number, because 2600221 - 2¹⁷ = 2469149 is a prime.

It is a super-2 number, since 2×2600221² = 13522298497682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 200017 = 2600221 / (2 + 6 + 0 + 0 + 2 + 2 + 1).

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2600231) 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, 99996 + ... + 100021.

It is an arithmetic number, because the mean of its divisors is an integer number (700063).

2^2600221 is an apocalyptic number.

It is an amenable number.

2600221 is a deficient number, since it is larger than the sum of its proper divisors (200031).

2600221 is a wasteful number, since it uses less digits than its factorization.

2600221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200030.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2600221 is about 1612.5200773944. The cubic root of 2600221 is about 137.5107826255.

Adding to 2600221 its reverse (1220062), we get a palindrome (3820283).

The spelling of 2600221 in words is "two million, six hundred thousand, two hundred twenty-one".