255262657671221 has 4 divisors (see below), whose sum is σ = 255276605706444. Its totient is φ = 255248709636000.

The previous prime is 255262657671211. The next prime is 255262657671239. The reversal of 255262657671221 is 122176756262552.

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

It can be written as a sum of positive squares in 2 ways, for example, as 135525686402500 + 119736971268721 = 11641550^2 + 10942439^2 .

It is a cyclic number.

It is not a de Polignac number, because 255262657671221 - 2⁶ = 255262657671157 is a prime.

It is a super-2 number, since 2×255262657671221² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255262657671211) 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, 6973990160 + ... + 6974026761.

It is an arithmetic number, because the mean of its divisors is an integer number (63819151426611).

Almost surely, 2^{255262657671221} is an apocalyptic number.

It is an amenable number.

255262657671221 is a deficient number, since it is larger than the sum of its proper divisors (13948035223).

255262657671221 is a wasteful number, since it uses less digits than its factorization.

255262657671221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13948035222.

The product of its digits is 42336000, while the sum is 59.

The spelling of 255262657671221 in words is "two hundred fifty-five trillion, two hundred sixty-two billion, six hundred fifty-seven million, six hundred seventy-one thousand, two hundred twenty-one".