255215512553 has 4 divisors (see below), whose sum is σ = 270228189780. Its totient is φ = 240202835328.

The previous prime is 255215512529. The next prime is 255215512577. The reversal of 255215512553 is 355215512552.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (255215512529) and next prime (255215512577).

It can be written as a sum of positive squares in 2 ways, for example, as 211294670224 + 43920842329 = 459668^2 + 209573^2 .

It is a cyclic number.

It is not a de Polignac number, because 255215512553 - 2²⁸ = 254947077097 is a prime.

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 255215512553.

It is not an unprimeable number, because it can be changed into a prime (255215512523) 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, 7506338588 + ... + 7506338621.

It is an arithmetic number, because the mean of its divisors is an integer number (67557047445).

Almost surely, 2^255215512553 is an apocalyptic number.

It is an amenable number.

255215512553 is a deficient number, since it is larger than the sum of its proper divisors (15012677227).

255215512553 is a wasteful number, since it uses less digits than its factorization.

255215512553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15012677226.

The product of its digits is 375000, while the sum is 41.

Subtracting 255215512553 from its reverse (355215512552), we obtain a palindrome (99999999999).

The spelling of 255215512553 in words is "two hundred fifty-five billion, two hundred fifteen million, five hundred twelve thousand, five hundred fifty-three".