243051451 has 2 divisors, whose sum is σ = 243051452. Its totient is φ = 243051450.

The previous prime is 243051449. The next prime is 243051461. The reversal of 243051451 is 154150342.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243051451 - 2¹ = 243051449 is a prime.

Together with 243051449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (243051461) 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, 121525725 + 121525726.

It is an arithmetic number, because the mean of its divisors is an integer number (121525726).

Almost surely, 2^243051451 is an apocalyptic number.

243051451 is a deficient number, since it is larger than the sum of its proper divisors (1).

243051451 is an equidigital number, since it uses as much as digits as its factorization.

243051451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 243051451 is about 15590.1074723685. The cubic root of 243051451 is about 624.0691859445.

The spelling of 243051451 in words is "two hundred forty-three million, fifty-one thousand, four hundred fifty-one".