243145220335 has 4 divisors (see below), whose sum is σ = 291774264408. Its totient is φ = 194516176264.

The previous prime is 243145220333. The next prime is 243145220369. The reversal of 243145220335 is 533022541342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 533022541342 = 2 ⋅266511270671.

It is a cyclic number.

It is not a de Polignac number, because 243145220335 - 2¹ = 243145220333 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243145220335.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243145220333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24314522029 + ... + 24314522038.

It is an arithmetic number, because the mean of its divisors is an integer number (72943566102).

Almost surely, 2^243145220335 is an apocalyptic number.

243145220335 is a deficient number, since it is larger than the sum of its proper divisors (48629044073).

243145220335 is an equidigital number, since it uses as much as digits as its factorization.

243145220335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48629044072.

The product of its (nonzero) digits is 86400, while the sum is 34.

Adding to 243145220335 its reverse (533022541342), we get a palindrome (776167761677).

The spelling of 243145220335 in words is "two hundred forty-three billion, one hundred forty-five million, two hundred twenty thousand, three hundred thirty-five".