451242163 has 2 divisors, whose sum is σ = 451242164. Its totient is φ = 451242162.

The previous prime is 451242161. The next prime is 451242217. The reversal of 451242163 is 361242154.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 451242163 - 2¹ = 451242161 is a prime.

Together with 451242161, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (451242161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225621081 + 225621082.

It is an arithmetic number, because the mean of its divisors is an integer number (225621082).

Almost surely, 2^451242163 is an apocalyptic number.

451242163 is a deficient number, since it is larger than the sum of its proper divisors (1).

451242163 is an equidigital number, since it uses as much as digits as its factorization.

451242163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 28.

The square root of 451242163 is about 21242.4613216077. The cubic root of 451242163 is about 767.0138818147.

Subtracting from 451242163 its reverse (361242154), we obtain a palindrome (90000009).

The spelling of 451242163 in words is "four hundred fifty-one million, two hundred forty-two thousand, one hundred sixty-three".