255238917 has 8 divisors (see below), whose sum is σ = 344142720. Its totient is φ = 168247200.

The previous prime is 255238909. The next prime is 255238933. The reversal of 255238917 is 719832552.

It is a happy number.

255238917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 255238917 - 2³ = 255238909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255238957) 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, 477709 + ... + 478242.

It is an arithmetic number, because the mean of its divisors is an integer number (43017840).

Almost surely, 2^255238917 is an apocalyptic number.

It is an amenable number.

255238917 is a deficient number, since it is larger than the sum of its proper divisors (88903803).

255238917 is an equidigital number, since it uses as much as digits as its factorization.

255238917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956043.

The product of its digits is 151200, while the sum is 42.

The square root of 255238917 is about 15976.1984526983. The cubic root of 255238917 is about 634.3305545378.

The spelling of 255238917 in words is "two hundred fifty-five million, two hundred thirty-eight thousand, nine hundred seventeen".