255128873 has 4 divisors (see below), whose sum is σ = 255453840. Its totient is φ = 254803908.

The previous prime is 255128869. The next prime is 255128893. The reversal of 255128873 is 378821552.

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 255128873 - 2² = 255128869 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 255128873.

It is not an unprimeable number, because it can be changed into a prime (255128833) 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, 161303 + ... + 162876.

It is an arithmetic number, because the mean of its divisors is an integer number (63863460).

Almost surely, 2^255128873 is an apocalyptic number.

It is an amenable number.

255128873 is a deficient number, since it is larger than the sum of its proper divisors (324967).

255128873 is an equidigital number, since it uses as much as digits as its factorization.

255128873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324966.

The product of its digits is 134400, while the sum is 41.

The square root of 255128873 is about 15972.7540831254. The cubic root of 255128873 is about 634.2393794320.

The spelling of 255128873 in words is "two hundred fifty-five million, one hundred twenty-eight thousand, eight hundred seventy-three".