2145271451 has 2 divisors, whose sum is σ = 2145271452. Its totient is φ = 2145271450.

The previous prime is 2145271441. The next prime is 2145271477. The reversal of 2145271451 is 1541725412.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2145271451 is a prime.

It is not a weakly prime, because it can be changed into another prime (2145271421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072635725 + 1072635726.

It is an arithmetic number, because the mean of its divisors is an integer number (1072635726).

Almost surely, 2^2145271451 is an apocalyptic number.

2145271451 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145271451 is an equidigital number, since it uses as much as digits as its factorization.

2145271451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11200, while the sum is 32.

The square root of 2145271451 is about 46317.0751559293. The cubic root of 2145271451 is about 1289.7159903978.

Adding to 2145271451 its reverse (1541725412), we get a palindrome (3686996863).

The spelling of 2145271451 in words is "two billion, one hundred forty-five million, two hundred seventy-one thousand, four hundred fifty-one".