243028451 has 2 divisors, whose sum is σ = 243028452. Its totient is φ = 243028450.

The previous prime is 243028441. The next prime is 243028531. The reversal of 243028451 is 154820342.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243028451 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243028421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121514225 + 121514226.

It is an arithmetic number, because the mean of its divisors is an integer number (121514226).

Almost surely, 2^243028451 is an apocalyptic number.

243028451 is a deficient number, since it is larger than the sum of its proper divisors (1).

243028451 is an equidigital number, since it uses as much as digits as its factorization.

243028451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 243028451 is about 15589.3698076606. The cubic root of 243028451 is about 624.0495000659.

Adding to 243028451 its reverse (154820342), we get a palindrome (397848793).

The spelling of 243028451 in words is "two hundred forty-three million, twenty-eight thousand, four hundred fifty-one".