2221641 has 16 divisors (see below), whose sum is σ = 3326400. Its totient is φ = 1465344.

The previous prime is 2221633. The next prime is 2221657. The reversal of 2221641 is 1461222.

2221641 is a `hidden beast` number, since 2 + 2 + 21 + 641 = 666.

It is not a de Polignac number, because 2221641 - 2³ = 2221633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2221631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2505 + ... + 3273.

It is an arithmetic number, because the mean of its divisors is an integer number (207900).

2^2221641 is an apocalyptic number.

It is an amenable number.

2221641 is a deficient number, since it is larger than the sum of its proper divisors (1104759).

2221641 is a wasteful number, since it uses less digits than its factorization.

2221641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885 (or 879 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 2221641 is about 1490.5170243912. The cubic root of 2221641 is about 130.4842100066.

Adding to 2221641 its reverse (1461222), we get a palindrome (3682863).

The spelling of 2221641 in words is "two million, two hundred twenty-one thousand, six hundred forty-one".