2220641 has 4 divisors (see below), whose sum is σ = 2232000. Its totient is φ = 2209284.

The previous prime is 2220553. The next prime is 2220643. The reversal of 2220641 is 1460222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1460222 = 2 ⋅730111.

It is a cyclic number.

It is not a de Polignac number, because 2220641 - 2¹⁸ = 1958497 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2220643) 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, 5381 + ... + 5778.

It is an arithmetic number, because the mean of its divisors is an integer number (558000).

2^2220641 is an apocalyptic number.

It is an amenable number.

2220641 is a deficient number, since it is larger than the sum of its proper divisors (11359).

2220641 is a wasteful number, since it uses less digits than its factorization.

2220641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11358.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2220641 is about 1490.1815325657. The cubic root of 2220641 is about 130.4646293164.

Adding to 2220641 its reverse (1460222), we get a palindrome (3680863).

The spelling of 2220641 in words is "two million, two hundred twenty thousand, six hundred forty-one".