2220401 has 4 divisors (see below), whose sum is σ = 2223600. Its totient is φ = 2217204.

The previous prime is 2220389. The next prime is 2220403. The reversal of 2220401 is 1040222.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1040222 = 2 ⋅520111.

It is a cyclic number.

It is not a de Polignac number, because 2220401 - 2¹⁰ = 2219377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2220403) 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, 71 + ... + 2108.

It is an arithmetic number, because the mean of its divisors is an integer number (555900).

2^2220401 is an apocalyptic number.

It is an amenable number.

2220401 is a deficient number, since it is larger than the sum of its proper divisors (3199).

2220401 is a wasteful number, since it uses less digits than its factorization.

2220401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3198.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 2220401 is about 1490.1010032880. The cubic root of 2220401 is about 130.4599290760.

Adding to 2220401 its reverse (1040222), we get a palindrome (3260623).

The spelling of 2220401 in words is "two million, two hundred twenty thousand, four hundred one".