123255333122515 has 64 divisors (see below), whose sum is σ = 164357628913152. Its totient is φ = 88720676204160.

The previous prime is 123255333122497. The next prime is 123255333122531. The reversal of 123255333122515 is 515221333552321.

It is not a de Polignac number, because 123255333122515 - 2²⁷ = 123255198904787 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 778229724 + ... + 778388086.

It is an arithmetic number, because the mean of its divisors is an integer number (2568087951768).

Almost surely, 2^{123255333122515} is an apocalyptic number.

123255333122515 is a deficient number, since it is larger than the sum of its proper divisors (41102295790637).

123255333122515 is a wasteful number, since it uses less digits than its factorization.

123255333122515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159601 (or 159579 counting only the distinct ones).

The product of its digits is 810000, while the sum is 43.

Adding to 123255333122515 its reverse (515221333552321), we get a palindrome (638476666674836).

The spelling of 123255333122515 in words is "one hundred twenty-three trillion, two hundred fifty-five billion, three hundred thirty-three million, one hundred twenty-two thousand, five hundred fifteen".