2171203249 has 2 divisors, whose sum is σ = 2171203250. Its totient is φ = 2171203248.

The previous prime is 2171203189. The next prime is 2171203261. The reversal of 2171203249 is 9423021712.

2171203249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1889467024 + 281736225 = 43468^2 + 16785^2 .

It is a cyclic number.

It is not a de Polignac number, because 2171203249 - 2²¹ = 2169106097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2171203249.

It is not a weakly prime, because it can be changed into another prime (2171203849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085601624 + 1085601625.

It is an arithmetic number, because the mean of its divisors is an integer number (1085601625).

Almost surely, 2^2171203249 is an apocalyptic number.

It is an amenable number.

2171203249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171203249 is an equidigital number, since it uses as much as digits as its factorization.

2171203249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 2171203249 is about 46596.1720423470. The cubic root of 2171203249 is about 1294.8918379373.

The spelling of 2171203249 in words is "two billion, one hundred seventy-one million, two hundred three thousand, two hundred forty-nine".