255597189 has 4 divisors (see below), whose sum is σ = 340796256. Its totient is φ = 170398124.

The previous prime is 255597187. The next prime is 255597211. The reversal of 255597189 is 981795552.

255597189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 255597189 - 2¹ = 255597187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255597187) 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, 42599529 + ... + 42599534.

It is an arithmetic number, because the mean of its divisors is an integer number (85199064).

Almost surely, 2^255597189 is an apocalyptic number.

It is an amenable number.

255597189 is a deficient number, since it is larger than the sum of its proper divisors (85199067).

255597189 is an equidigital number, since it uses as much as digits as its factorization.

255597189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85199066.

The product of its digits is 1134000, while the sum is 51.

The square root of 255597189 is about 15987.4072006689. The cubic root of 255597189 is about 634.6272133541.

The spelling of 255597189 in words is "two hundred fifty-five million, five hundred ninety-seven thousand, one hundred eighty-nine".