255191000 has 32 divisors (see below), whose sum is σ = 597149280. Its totient is φ = 102076000.

The previous prime is 255190997. The next prime is 255191009. The reversal of 255191000 is 191552.

255191000 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255191009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126596 + ... + 128595.

It is an arithmetic number, because the mean of its divisors is an integer number (18660915).

Almost surely, 2^255191000 is an apocalyptic number.

255191000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255191000 is an abundant number, since it is smaller than the sum of its proper divisors (341958280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255191000 is a wasteful number, since it uses less digits than its factorization.

255191000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255212 (or 255198 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 255191000 is about 15974.6987452033. The cubic root of 255191000 is about 634.2908569350.

The spelling of 255191000 in words is "two hundred fifty-five million, one hundred ninety-one thousand".