255309859 has 16 divisors (see below), whose sum is σ = 325209600. Its totient is φ = 195122304.

The previous prime is 255309853. The next prime is 255309863. The reversal of 255309859 is 958903552.

It is a cyclic number.

It is not a de Polignac number, because 255309859 - 2¹⁹ = 254785571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255309853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54199 + ... + 58720.

It is an arithmetic number, because the mean of its divisors is an integer number (20325600).

Almost surely, 2^255309859 is an apocalyptic number.

255309859 is a deficient number, since it is larger than the sum of its proper divisors (69899741).

255309859 is a wasteful number, since it uses less digits than its factorization.

255309859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112962.

The product of its (nonzero) digits is 486000, while the sum is 46.

The square root of 255309859 is about 15978.4185387666. The cubic root of 255309859 is about 634.3893184470.

The spelling of 255309859 in words is "two hundred fifty-five million, three hundred nine thousand, eight hundred fifty-nine".