255421230343243 has 4 divisors (see below), whose sum is σ = 255421292406280. Its totient is φ = 255421168280208.

The previous prime is 255421230343163. The next prime is 255421230343267. The reversal of 255421230343243 is 342343032124552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 255421230343243 - 2⁹ = 255421230342731 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 255421230343243.

It is not an unprimeable number, because it can be changed into a prime (255421230343343) 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, 24383505 + ... + 33247522.

It is an arithmetic number, because the mean of its divisors is an integer number (63855323101570).

Almost surely, 2^{255421230343243} is an apocalyptic number.

255421230343243 is a deficient number, since it is larger than the sum of its proper divisors (62063037).

255421230343243 is an equidigital number, since it uses as much as digits as its factorization.

255421230343243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62063036.

The product of its (nonzero) digits is 2073600, while the sum is 43.

Adding to 255421230343243 its reverse (342343032124552), we get a palindrome (597764262467795).

The spelling of 255421230343243 in words is "two hundred fifty-five trillion, four hundred twenty-one billion, two hundred thirty million, three hundred forty-three thousand, two hundred forty-three".