255515505 has 32 divisors (see below), whose sum is σ = 467917824. Its totient is φ = 116634816.

The previous prime is 255515479. The next prime is 255515521. The reversal of 255515505 is 505515552.

It is not a de Polignac number, because 255515505 - 2¹⁰ = 255514481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93894 + ... + 96576.

It is an arithmetic number, because the mean of its divisors is an integer number (14622432).

Almost surely, 2^255515505 is an apocalyptic number.

It is an amenable number.

255515505 is a deficient number, since it is larger than the sum of its proper divisors (212402319).

255515505 is a wasteful number, since it uses less digits than its factorization.

255515505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3605.

The product of its (nonzero) digits is 31250, while the sum is 33.

The square root of 255515505 is about 15984.8523609072. The cubic root of 255515505 is about 634.5596012223.

The spelling of 255515505 in words is "two hundred fifty-five million, five hundred fifteen thousand, five hundred five".