255251515 has 16 divisors (see below), whose sum is σ = 324725760. Its totient is φ = 191948800.

The previous prime is 255251473. The next prime is 255251537. The reversal of 255251515 is 515152552.

It is not a de Polignac number, because 255251515 - 2⁷ = 255251387 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 96531 + ... + 99139.

It is an arithmetic number, because the mean of its divisors is an integer number (20295360).

Almost surely, 2^255251515 is an apocalyptic number.

255251515 is the 13045-th pentagonal number.

255251515 is a deficient number, since it is larger than the sum of its proper divisors (69474245).

255251515 is a wasteful number, since it uses less digits than its factorization.

255251515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3782.

The product of its digits is 12500, while the sum is 31.

The square root of 255251515 is about 15976.5927218541. The cubic root of 255251515 is about 634.3409907269.

The spelling of 255251515 in words is "two hundred fifty-five million, two hundred fifty-one thousand, five hundred fifteen".