2550221 has 8 divisors (see below), whose sum is σ = 2741760. Its totient is φ = 2363328.

The previous prime is 2550209. The next prime is 2550253. The reversal of 2550221 is 1220552.

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

It is a cyclic number.

It is not a de Polignac number, because 2550221 - 2¹⁴ = 2533837 is a prime.

It is a super-3 number, since 3×2550221³ = 49757059593433331583, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 2550221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2550281) 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 7 ways as a sum of consecutive naturals, for example, 20 + ... + 2258.

It is an arithmetic number, because the mean of its divisors is an integer number (342720).

2^2550221 is an apocalyptic number.

It is an amenable number.

2550221 is a deficient number, since it is larger than the sum of its proper divisors (191539).

2550221 is a wasteful number, since it uses less digits than its factorization.

2550221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 2550221 is about 1596.9411385521. The cubic root of 2550221 is about 136.6236674826.

Adding to 2550221 its reverse (1220552), we get a palindrome (3770773).

The spelling of 2550221 in words is "two million, five hundred fifty thousand, two hundred twenty-one".