2221699 has 2 divisors, whose sum is σ = 2221700. Its totient is φ = 2221698.

The previous prime is 2221673. The next prime is 2221711. The reversal of 2221699 is 9961222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2221699 - 2⁹ = 2221187 is a prime.

It is an Ulam number.

2221699 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2221699.

It is not a weakly prime, because it can be changed into another prime (2221669) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110849 + 1110850.

It is an arithmetic number, because the mean of its divisors is an integer number (1110850).

2^2221699 is an apocalyptic number.

2221699 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221699 is an equidigital number, since it uses as much as digits as its factorization.

2221699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 31.

The square root of 2221699 is about 1490.5364806002. The cubic root of 2221699 is about 130.4853455063.

The spelling of 2221699 in words is "two million, two hundred twenty-one thousand, six hundred ninety-nine".