2145454211 has 2 divisors, whose sum is σ = 2145454212. Its totient is φ = 2145454210.

The previous prime is 2145454189. The next prime is 2145454277. The reversal of 2145454211 is 1124545412.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2145454211 - 2¹⁸ = 2145192067 is a prime.

It is not a weakly prime, because it can be changed into another prime (2145454291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072727105 + 1072727106.

It is an arithmetic number, because the mean of its divisors is an integer number (1072727106).

Almost surely, 2^2145454211 is an apocalyptic number.

2145454211 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145454211 is an equidigital number, since it uses as much as digits as its factorization.

2145454211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6400, while the sum is 29.

The square root of 2145454211 is about 46319.0480364180. The cubic root of 2145454211 is about 1289.7526138596.

Adding to 2145454211 its reverse (1124545412), we get a palindrome (3269999623).

The spelling of 2145454211 in words is "two billion, one hundred forty-five million, four hundred fifty-four thousand, two hundred eleven".