255535811 has 4 divisors (see below), whose sum is σ = 257548032. Its totient is φ = 253523592.

The previous prime is 255535781. The next prime is 255535831. The reversal of 255535811 is 118535552.

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 255535811 - 2¹⁰ = 255534787 is a prime.

It is a super-3 number, since 3×255535811³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255535831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1005920 + ... + 1006173.

It is an arithmetic number, because the mean of its divisors is an integer number (64387008).

Almost surely, 2^255535811 is an apocalyptic number.

255535811 is a deficient number, since it is larger than the sum of its proper divisors (2012221).

255535811 is a wasteful number, since it uses less digits than its factorization.

255535811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012220.

The product of its digits is 30000, while the sum is 35.

The square root of 255535811 is about 15985.4875121155. The cubic root of 255535811 is about 634.5764104122.

The spelling of 255535811 in words is "two hundred fifty-five million, five hundred thirty-five thousand, eight hundred eleven".