243420354455 has 8 divisors (see below), whose sum is σ = 292333175712. Its totient is φ = 194583783328.

The previous prime is 243420354451. The next prime is 243420354461. The reversal of 243420354455 is 554453024342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243420354455 - 2² = 243420354451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243420354451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19055507 + ... + 19068276.

It is an arithmetic number, because the mean of its divisors is an integer number (36541646964).

Almost surely, 2^243420354455 is an apocalyptic number.

243420354455 is a deficient number, since it is larger than the sum of its proper divisors (48912821257).

243420354455 is a wasteful number, since it uses less digits than its factorization.

243420354455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38125065.

The product of its (nonzero) digits is 1152000, while the sum is 41.

Adding to 243420354455 its reverse (554453024342), we get a palindrome (797873378797).

The spelling of 243420354455 in words is "two hundred forty-three billion, four hundred twenty million, three hundred fifty-four thousand, four hundred fifty-five".