2319221 has 2 divisors, whose sum is σ = 2319222. Its totient is φ = 2319220.

The previous prime is 2319181. The next prime is 2319241. The reversal of 2319221 is 1229132.

It is an a-pointer prime, because the next prime (2319241) can be obtained adding 2319221 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2283121 + 36100 = 1511^2 + 190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2319221 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2319193 and 2319202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2319241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1159610 + 1159611.

It is an arithmetic number, because the mean of its divisors is an integer number (1159611).

2^2319221 is an apocalyptic number.

It is an amenable number.

2319221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2319221 is an equidigital number, since it uses as much as digits as its factorization.

2319221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 20.

The square root of 2319221 is about 1522.8988804251. The cubic root of 2319221 is about 132.3673003951.

The spelling of 2319221 in words is "two million, three hundred nineteen thousand, two hundred twenty-one".