255215447 has 4 divisors (see below), whose sum is σ = 261440256. Its totient is φ = 248990640.

The previous prime is 255215413. The next prime is 255215453. The reversal of 255215447 is 744512552.

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 255215447 - 2²⁴ = 238438231 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 (255215647) 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, 3112343 + ... + 3112424.

It is an arithmetic number, because the mean of its divisors is an integer number (65360064).

Almost surely, 2^255215447 is an apocalyptic number.

255215447 is a deficient number, since it is larger than the sum of its proper divisors (6224809).

255215447 is an equidigital number, since it uses as much as digits as its factorization.

255215447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6224808.

The product of its digits is 56000, while the sum is 35.

The square root of 255215447 is about 15975.4639056273. The cubic root of 255215447 is about 634.3111110628.

Adding to 255215447 its reverse (744512552), we get a palindrome (999727999).

The spelling of 255215447 in words is "two hundred fifty-five million, two hundred fifteen thousand, four hundred forty-seven".