255215415042123 has 4 divisors (see below), whose sum is σ = 340287220056168. Its totient is φ = 170143610028080.

The previous prime is 255215415042121. The next prime is 255215415042131. The reversal of 255215415042123 is 321240514512552.

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 255215415042123 - 2¹ = 255215415042121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255215415042121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42535902507018 + ... + 42535902507023.

It is an arithmetic number, because the mean of its divisors is an integer number (85071805014042).

Almost surely, 2^{255215415042123} is an apocalyptic number.

255215415042123 is a deficient number, since it is larger than the sum of its proper divisors (85071805014045).

255215415042123 is an equidigital number, since it uses as much as digits as its factorization.

255215415042123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85071805014044.

The product of its (nonzero) digits is 480000, while the sum is 42.

Adding to 255215415042123 its reverse (321240514512552), we get a palindrome (576455929554675).

The spelling of 255215415042123 in words is "two hundred fifty-five trillion, two hundred fifteen billion, four hundred fifteen million, forty-two thousand, one hundred twenty-three".