255355315525321 has 4 divisors (see below), whose sum is σ = 278569435118544. Its totient is φ = 232141195932100.

The previous prime is 255355315525223. The next prime is 255355315525361. The reversal of 255355315525321 is 123525513553552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255355315525321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255355315525361) 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, 11607059796595 + ... + 11607059796616.

It is an arithmetic number, because the mean of its divisors is an integer number (69642358779636).

Almost surely, 2^{255355315525321} is an apocalyptic number.

It is an amenable number.

255355315525321 is a deficient number, since it is larger than the sum of its proper divisors (23214119593223).

255355315525321 is a wasteful number, since it uses less digits than its factorization.

255355315525321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23214119593222.

The product of its digits is 16875000, while the sum is 52.

The spelling of 255355315525321 in words is "two hundred fifty-five trillion, three hundred fifty-five billion, three hundred fifteen million, five hundred twenty-five thousand, three hundred twenty-one".