255212505 has 32 divisors (see below), whose sum is σ = 457056000. Its totient is φ = 135110016.

The previous prime is 255212501. The next prime is 255212537. The reversal of 255212505 is 505212552.

It is not a de Polignac number, because 255212505 - 2² = 255212501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (255212501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11596 + ... + 25394.

It is an arithmetic number, because the mean of its divisors is an integer number (14283000).

Almost surely, 2^255212505 is an apocalyptic number.

It is an amenable number.

255212505 is a deficient number, since it is larger than the sum of its proper divisors (201843495).

255212505 is a wasteful number, since it uses less digits than its factorization.

255212505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13950 (or 13944 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 255212505 is about 15975.3718266587. The cubic root of 255212505 is about 634.3086737098.

The spelling of 255212505 in words is "two hundred fifty-five million, two hundred twelve thousand, five hundred five".