2208473021 has 2 divisors, whose sum is σ = 2208473022. Its totient is φ = 2208473020.

The previous prime is 2208472997. The next prime is 2208473027. The reversal of 2208473021 is 1203748022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2140080121 + 68392900 = 46261^2 + 8270^2 .

It is a cyclic number.

It is not a de Polignac number, because 2208473021 - 2⁶ = 2208472957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2208473027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1104236510 + 1104236511.

It is an arithmetic number, because the mean of its divisors is an integer number (1104236511).

Almost surely, 2^2208473021 is an apocalyptic number.

It is an amenable number.

2208473021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2208473021 is an equidigital number, since it uses as much as digits as its factorization.

2208473021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 2208473021 is about 46994.3935060343. The cubic root of 2208473021 is about 1302.2589955689.

The spelling of 2208473021 in words is "two billion, two hundred eight million, four hundred seventy-three thousand, twenty-one".