2221379 has 2 divisors, whose sum is σ = 2221380. Its totient is φ = 2221378.

The previous prime is 2221343. The next prime is 2221381. The reversal of 2221379 is 9731222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2221379 - 2¹² = 2217283 is a prime.

Together with 2221381, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2221399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110689 + 1110690.

It is an arithmetic number, because the mean of its divisors is an integer number (1110690).

2^2221379 is an apocalyptic number.

2221379 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221379 is an equidigital number, since it uses as much as digits as its factorization.

2221379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 26.

The square root of 2221379 is about 1490.4291328339. The cubic root of 2221379 is about 130.4790804339.

The spelling of 2221379 in words is "two million, two hundred twenty-one thousand, three hundred seventy-nine".