255520515 has 8 divisors (see below), whose sum is σ = 408832848. Its totient is φ = 136277600.

The previous prime is 255520511. The next prime is 255520567. The reversal of 255520515 is 515025552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 255520515 - 2² = 255520511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255520511) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8517336 + ... + 8517365.

It is an arithmetic number, because the mean of its divisors is an integer number (51104106).

Almost surely, 2^255520515 is an apocalyptic number.

255520515 is a deficient number, since it is larger than the sum of its proper divisors (153312333).

255520515 is a wasteful number, since it uses less digits than its factorization.

255520515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17034709.

The product of its (nonzero) digits is 12500, while the sum is 30.

The square root of 255520515 is about 15985.0090710015. The cubic root of 255520515 is about 634.5637485542.

The spelling of 255520515 in words is "two hundred fifty-five million, five hundred twenty thousand, five hundred fifteen".