2220651 has 6 divisors (see below), whose sum is σ = 3207620. Its totient is φ = 1480428.

The previous prime is 2220643. The next prime is 2220653. The reversal of 2220651 is 1560222.

2220651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2220651 - 2³ = 2220643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2220653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123361 + ... + 123378.

2^2220651 is an apocalyptic number.

2220651 is a deficient number, since it is larger than the sum of its proper divisors (986969).

2220651 is a wasteful number, since it uses less digits than its factorization.

2220651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246745 (or 246742 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2220651 is about 1490.1848878579. The cubic root of 2220651 is about 130.4648251523.

Adding to 2220651 its reverse (1560222), we get a palindrome (3780873).

The spelling of 2220651 in words is "two million, two hundred twenty thousand, six hundred fifty-one".