255960221 has 8 divisors (see below), whose sum is σ = 279396000. Its totient is φ = 232552240.

The previous prime is 255960217. The next prime is 255960223. The reversal of 255960221 is 122069552.

255960221 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 a cyclic number.

It is not a de Polignac number, because 255960221 - 2² = 255960217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255960223) 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, 15470 + ... + 27408.

It is an arithmetic number, because the mean of its divisors is an integer number (34924500).

Almost surely, 2^255960221 is an apocalyptic number.

It is an amenable number.

255960221 is a deficient number, since it is larger than the sum of its proper divisors (23435779).

255960221 is a wasteful number, since it uses less digits than its factorization.

255960221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13899.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 255960221 is about 15998.7568579562. The cubic root of 255960221 is about 634.9275309449.

The spelling of 255960221 in words is "two hundred fifty-five million, nine hundred sixty thousand, two hundred twenty-one".