255540211 has 4 divisors (see below), whose sum is σ = 259354312. Its totient is φ = 251726112.

The previous prime is 255540193. The next prime is 255540239. The reversal of 255540211 is 112045552.

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 255540211 - 2¹³ = 255532019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255540011) 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, 1906950 + ... + 1907083.

It is an arithmetic number, because the mean of its divisors is an integer number (64838578).

Almost surely, 2^255540211 is an apocalyptic number.

255540211 is a deficient number, since it is larger than the sum of its proper divisors (3814101).

255540211 is an equidigital number, since it uses as much as digits as its factorization.

255540211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3814100.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 255540211 is about 15985.6251363530. The cubic root of 255540211 is about 634.5800525895.

Adding to 255540211 its reverse (112045552), we get a palindrome (367585763).

The spelling of 255540211 in words is "two hundred fifty-five million, five hundred forty thousand, two hundred eleven".