255288021 has 8 divisors (see below), whose sum is σ = 340524384. Its totient is φ = 170121840.

The previous prime is 255288001. The next prime is 255288029. The reversal of 255288021 is 120882552.

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

It is not a de Polignac number, because 255288021 - 2¹¹ = 255285973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255288029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8371 + ... + 24096.

It is an arithmetic number, because the mean of its divisors is an integer number (42565548).

Almost surely, 2^255288021 is an apocalyptic number.

It is an amenable number.

255288021 is a deficient number, since it is larger than the sum of its proper divisors (85236363).

255288021 is a wasteful number, since it uses less digits than its factorization.

255288021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35091.

The product of its (nonzero) digits is 12800, while the sum is 33.

The square root of 255288021 is about 15977.7351649100. The cubic root of 255288021 is about 634.3712303755.

The spelling of 255288021 in words is "two hundred fifty-five million, two hundred eighty-eight thousand, twenty-one".