255321511 has 4 divisors (see below), whose sum is σ = 260138952. Its totient is φ = 250504072.

The previous prime is 255321463. The next prime is 255321527. The reversal of 255321511 is 115123552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 255321511 - 2¹⁵ = 255288743 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 (255321211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2408641 + ... + 2408746.

It is an arithmetic number, because the mean of its divisors is an integer number (65034738).

Almost surely, 2^255321511 is an apocalyptic number.

255321511 is a deficient number, since it is larger than the sum of its proper divisors (4817441).

255321511 is an equidigital number, since it uses as much as digits as its factorization.

255321511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4817440.

The product of its digits is 1500, while the sum is 25.

The square root of 255321511 is about 15978.7831514168. The cubic root of 255321511 is about 634.3989691931.

The spelling of 255321511 in words is "two hundred fifty-five million, three hundred twenty-one thousand, five hundred eleven".