255105447521 has 4 divisors (see below), whose sum is σ = 255112915200. Its totient is φ = 255097979844.

The previous prime is 255105447511. The next prime is 255105447523. The reversal of 255105447521 is 125744501552.

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 not a de Polignac number, because 255105447521 - 2¹⁴ = 255105431137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255105447523) 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, 3682361 + ... + 3750998.

It is an arithmetic number, because the mean of its divisors is an integer number (63778228800).

Almost surely, 2^255105447521 is an apocalyptic number.

It is an amenable number.

255105447521 is a deficient number, since it is larger than the sum of its proper divisors (7467679).

255105447521 is an equidigital number, since it uses as much as digits as its factorization.

255105447521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7467678.

The product of its (nonzero) digits is 280000, while the sum is 41.

The spelling of 255105447521 in words is "two hundred fifty-five billion, one hundred five million, four hundred forty-seven thousand, five hundred twenty-one".