2054221 has 4 divisors (see below), whose sum is σ = 2212252. Its totient is φ = 1896192.

The previous prime is 2054207. The next prime is 2054231. The reversal of 2054221 is 1224502.

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

It can be written as a sum of positive squares in 2 ways, for example, as 756900 + 1297321 = 870^2 + 1139^2 .

It is a cyclic number.

It is not a de Polignac number, because 2054221 - 2⁵ = 2054189 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2054195 and 2054204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2054231) 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, 78996 + ... + 79021.

It is an arithmetic number, because the mean of its divisors is an integer number (553063).

2^2054221 is an apocalyptic number.

It is an amenable number.

2054221 is a deficient number, since it is larger than the sum of its proper divisors (158031).

2054221 is a wasteful number, since it uses less digits than its factorization.

2054221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158030.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 2054221 is about 1433.2553854774. The cubic root of 2054221 is about 127.1205378007.

Adding to 2054221 its reverse (1224502), we get a palindrome (3278723).

The spelling of 2054221 in words is "two million, fifty-four thousand, two hundred twenty-one".