255616515 has 48 divisors (see below), whose sum is σ = 552404736. Its totient is φ = 106228800.

The previous prime is 255616513. The next prime is 255616523. The reversal of 255616515 is 515616552.

255616515 is a `hidden beast` number, since 25 + 5 + 616 + 5 + 15 = 666.

255616515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 255616515 - 2¹ = 255616513 is a prime.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 255616515.

It is not an unprimeable number, because it can be changed into a prime (255616513) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33421 + ... + 40350.

It is an arithmetic number, because the mean of its divisors is an integer number (11508432).

Almost surely, 2^255616515 is an apocalyptic number.

255616515 is an abundant number, since it is smaller than the sum of its proper divisors (296788221).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255616515 is a wasteful number, since it uses less digits than its factorization.

255616515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73800 (or 73797 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

The square root of 255616515 is about 15988.0116024476. The cubic root of 255616515 is about 634.6432079177.

The spelling of 255616515 in words is "two hundred fifty-five million, six hundred sixteen thousand, five hundred fifteen".