255303217889 has 4 divisors (see below), whose sum is σ = 257935209924. Its totient is φ = 252671225856.

The previous prime is 255303217879. The next prime is 255303217901. The reversal of 255303217889 is 988712303552.

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 208681771489 + 46621446400 = 456817^2 + 215920^2 .

It is a cyclic number.

It is not a de Polignac number, because 255303217889 - 2¹⁶ = 255303152353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 255303217889.

It is not an unprimeable number, because it can be changed into a prime (255303217879) 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, 1315995872 + ... + 1315996065.

It is an arithmetic number, because the mean of its divisors is an integer number (64483802481).

Almost surely, 2^255303217889 is an apocalyptic number.

It is an amenable number.

255303217889 is a deficient number, since it is larger than the sum of its proper divisors (2631992035).

255303217889 is an equidigital number, since it uses as much as digits as its factorization.

255303217889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631992034.

The product of its (nonzero) digits is 3628800, while the sum is 53.

The spelling of 255303217889 in words is "two hundred fifty-five billion, three hundred three million, two hundred seventeen thousand, eight hundred eighty-nine".