451340243 has 2 divisors, whose sum is σ = 451340244. Its totient is φ = 451340242.

The previous prime is 451340237. The next prime is 451340251. The reversal of 451340243 is 342043154.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 451340243 - 2⁶ = 451340179 is a prime.

It is not a weakly prime, because it can be changed into another prime (451340273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225670121 + 225670122.

It is an arithmetic number, because the mean of its divisors is an integer number (225670122).

Almost surely, 2^451340243 is an apocalyptic number.

451340243 is a deficient number, since it is larger than the sum of its proper divisors (1).

451340243 is an equidigital number, since it uses as much as digits as its factorization.

451340243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 451340243 is about 21244.7697798776. The cubic root of 451340243 is about 767.0694493701.

Adding to 451340243 its reverse (342043154), we get a palindrome (793383397).

The spelling of 451340243 in words is "four hundred fifty-one million, three hundred forty thousand, two hundred forty-three".