2145202271 has 2 divisors, whose sum is σ = 2145202272. Its totient is φ = 2145202270.

The previous prime is 2145202237. The next prime is 2145202331. The reversal of 2145202271 is 1722025412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2145202271 - 2⁶ = 2145202207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2145202271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2145262271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072601135 + 1072601136.

It is an arithmetic number, because the mean of its divisors is an integer number (1072601136).

Almost surely, 2^2145202271 is an apocalyptic number.

2145202271 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145202271 is an equidigital number, since it uses as much as digits as its factorization.

2145202271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 2145202271 is about 46316.3283410937. The cubic root of 2145202271 is about 1289.7021268048.

Adding to 2145202271 its reverse (1722025412), we get a palindrome (3867227683).

The spelling of 2145202271 in words is "two billion, one hundred forty-five million, two hundred two thousand, two hundred seventy-one".