255405511 has 4 divisors (see below), whose sum is σ = 255907800. Its totient is φ = 254903224.

The previous prime is 255405443. The next prime is 255405517. The reversal of 255405511 is 115504552.

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 255405511 - 2¹³ = 255397319 is a prime.

It is a super-2 number, since 2×255405511² = 130463950098342242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 255405511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255405517) 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 3 ways as a sum of consecutive naturals, for example, 250381 + ... + 251398.

It is an arithmetic number, because the mean of its divisors is an integer number (63976950).

Almost surely, 2^255405511 is an apocalyptic number.

255405511 is a deficient number, since it is larger than the sum of its proper divisors (502289).

255405511 is an equidigital number, since it uses as much as digits as its factorization.

255405511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502288.

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 255405511 is about 15981.4114207726. The cubic root of 255405511 is about 634.4685333415.

The spelling of 255405511 in words is "two hundred fifty-five million, four hundred five thousand, five hundred eleven".