2307221 has 4 divisors (see below), whose sum is σ = 2636832. Its totient is φ = 1977612.

The previous prime is 2307197. The next prime is 2307229. The reversal of 2307221 is 1227032.

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.

It is not a de Polignac number, because 2307221 - 2⁶ = 2307157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2307221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2307229) 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, 164795 + ... + 164808.

It is an arithmetic number, because the mean of its divisors is an integer number (659208).

2^2307221 is an apocalyptic number.

It is an amenable number.

2307221 is a deficient number, since it is larger than the sum of its proper divisors (329611).

2307221 is an equidigital number, since it uses as much as digits as its factorization.

2307221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329610.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 2307221 is about 1518.9539163516. The cubic root of 2307221 is about 132.1386093734.

The spelling of 2307221 in words is "two million, three hundred seven thousand, two hundred twenty-one".