2371221 has 16 divisors (see below), whose sum is σ = 3627520. Its totient is φ = 1529280.

The previous prime is 2371207. The next prime is 2371223. The reversal of 2371221 is 1221732.

It is not a de Polignac number, because 2371221 - 2⁵ = 2371189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2371194 and 2371203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2371223) 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, 580 + ... + 2253.

It is an arithmetic number, because the mean of its divisors is an integer number (226720).

2^2371221 is an apocalyptic number.

It is an amenable number.

2371221 is a deficient number, since it is larger than the sum of its proper divisors (1256299).

2371221 is a wasteful number, since it uses less digits than its factorization.

2371221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2873 (or 2867 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 2371221 is about 1539.8769431354. The cubic root of 2371221 is about 133.3492807314.

Adding to 2371221 its reverse (1221732), we get a palindrome (3592953).

The spelling of 2371221 in words is "two million, three hundred seventy-one thousand, two hundred twenty-one".