255440203042015 has 4 divisors (see below), whose sum is σ = 306528243650424. Its totient is φ = 204352162433608.

The previous prime is 255440203041983. The next prime is 255440203042121. The reversal of 255440203042015 is 510240302044552.

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 255440203042015 - 2⁵ = 255440203041983 is a prime.

It is a super-3 number, since 3×255440203042015³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25544020304197 + ... + 25544020304206.

It is an arithmetic number, because the mean of its divisors is an integer number (76632060912606).

Almost surely, 2^{255440203042015} is an apocalyptic number.

255440203042015 is a deficient number, since it is larger than the sum of its proper divisors (51088040608409).

255440203042015 is an equidigital number, since it uses as much as digits as its factorization.

255440203042015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51088040608408.

The product of its (nonzero) digits is 192000, while the sum is 37.

Adding to 255440203042015 its reverse (510240302044552), we get a palindrome (765680505086567).

The spelling of 255440203042015 in words is "two hundred fifty-five trillion, four hundred forty billion, two hundred three million, forty-two thousand, fifteen".