2145273211 has 2 divisors, whose sum is σ = 2145273212. Its totient is φ = 2145273210.

The previous prime is 2145273167. The next prime is 2145273241. The reversal of 2145273211 is 1123725412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2145273211 - 2⁷ = 2145273083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2145273211.

It is not a weakly prime, because it can be changed into another prime (2145273241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072636605 + 1072636606.

It is an arithmetic number, because the mean of its divisors is an integer number (1072636606).

Almost surely, 2^2145273211 is an apocalyptic number.

2145273211 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145273211 is an equidigital number, since it uses as much as digits as its factorization.

2145273211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 28.

The square root of 2145273211 is about 46317.0941553980. The cubic root of 2145273211 is about 1289.7163430959.

Adding to 2145273211 its reverse (1123725412), we get a palindrome (3268998623).

The spelling of 2145273211 in words is "two billion, one hundred forty-five million, two hundred seventy-three thousand, two hundred eleven".