2213971 has 2 divisors, whose sum is σ = 2213972. Its totient is φ = 2213970.

The previous prime is 2213963. The next prime is 2213977. The reversal of 2213971 is 1793122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2213971 - 2³ = 2213963 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2213977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106985 + 1106986.

It is an arithmetic number, because the mean of its divisors is an integer number (1106986).

2^2213971 is an apocalyptic number.

2213971 is a deficient number, since it is larger than the sum of its proper divisors (1).

2213971 is an equidigital number, since it uses as much as digits as its factorization.

2213971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 25.

The square root of 2213971 is about 1487.9418671440. The cubic root of 2213971 is about 130.3338755102. Note that the first 3 decimals are identical.

The spelling of 2213971 in words is "two million, two hundred thirteen thousand, nine hundred seventy-one".