2221943 has 2 divisors, whose sum is σ = 2221944. Its totient is φ = 2221942.

The previous prime is 2221931. The next prime is 2221949. The reversal of 2221943 is 3491222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2221943 - 2¹⁰ = 2220919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110971 + 1110972.

It is an arithmetic number, because the mean of its divisors is an integer number (1110972).

2^2221943 is an apocalyptic number.

2221943 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221943 is an equidigital number, since it uses as much as digits as its factorization.

2221943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 2221943 is about 1490.6183280773. The cubic root of 2221943 is about 130.4901222198.

The spelling of 2221943 in words is "two million, two hundred twenty-one thousand, nine hundred forty-three".