255864015 has 80 divisors (see below), whose sum is σ = 507386880. Its totient is φ = 122316480.

The previous prime is 255864001. The next prime is 255864023. The reversal of 255864015 is 510468552.

255864015 is a `hidden beast` number, since 2 + 5 + 5 + 8 + 640 + 1 + 5 = 666.

255864015 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 255864015 - 2⁷ = 255863887 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 351582 + ... + 352308.

It is an arithmetic number, because the mean of its divisors is an integer number (6342336).

Almost surely, 2^255864015 is an apocalyptic number.

255864015 is a deficient number, since it is larger than the sum of its proper divisors (251522865).

255864015 is a wasteful number, since it uses less digits than its factorization.

255864015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834 (or 825 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 255864015 is about 15995.7499042714. The cubic root of 255864015 is about 634.8479723681.

The spelling of 255864015 in words is "two hundred fifty-five million, eight hundred sixty-four thousand, fifteen".