2943423221 has 2 divisors, whose sum is σ = 2943423222. Its totient is φ = 2943423220.

The previous prime is 2943423199. The next prime is 2943423227. The reversal of 2943423221 is 1223243492.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1582846225 + 1360576996 = 39785^2 + 36886^2 .

It is a cyclic number.

It is not a de Polignac number, because 2943423221 - 2⁶ = 2943423157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2943423227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1471711610 + 1471711611.

It is an arithmetic number, because the mean of its divisors is an integer number (1471711611).

Almost surely, 2^2943423221 is an apocalyptic number.

It is an amenable number.

2943423221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2943423221 is an equidigital number, since it uses as much as digits as its factorization.

2943423221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 32.

The square root of 2943423221 is about 54253.3245156460. The cubic root of 2943423221 is about 1433.1255450665.

The spelling of 2943423221 in words is "two billion, nine hundred forty-three million, four hundred twenty-three thousand, two hundred twenty-one".