255309089 has 4 divisors (see below), whose sum is σ = 291781824. Its totient is φ = 218836356.

The previous prime is 255309083. The next prime is 255309097. The reversal of 255309089 is 980903552.

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 255309089 - 2⁴ = 255309073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255309083) 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, 18236357 + ... + 18236370.

It is an arithmetic number, because the mean of its divisors is an integer number (72945456).

Almost surely, 2^255309089 is an apocalyptic number.

It is an amenable number.

255309089 is a deficient number, since it is larger than the sum of its proper divisors (36472735).

255309089 is an equidigital number, since it uses as much as digits as its factorization.

255309089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36472734.

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 255309089 is about 15978.3944437481. The cubic root of 255309089 is about 634.3886806857.

The spelling of 255309089 in words is "two hundred fifty-five million, three hundred nine thousand, eighty-nine".