255120321 has 8 divisors (see below), whose sum is σ = 341621280. Its totient is φ = 169349792.

The previous prime is 255120317. The next prime is 255120329. The reversal of 255120321 is 123021552.

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

It is a cyclic number.

It is not a de Polignac number, because 255120321 - 2² = 255120317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255120329) 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, 181791 + ... + 183188.

It is an arithmetic number, because the mean of its divisors is an integer number (42702660).

Almost surely, 2^255120321 is an apocalyptic number.

It is an amenable number.

255120321 is a deficient number, since it is larger than the sum of its proper divisors (86500959).

255120321 is a wasteful number, since it uses less digits than its factorization.

255120321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365215.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 255120321 is about 15972.4863750138. The cubic root of 255120321 is about 634.2322927184.

Adding to 255120321 its reverse (123021552), we get a palindrome (378141873).

The spelling of 255120321 in words is "two hundred fifty-five million, one hundred twenty thousand, three hundred twenty-one".