255312405 has 40 divisors (see below), whose sum is σ = 481773600. Its totient is φ = 128996064.

The previous prime is 255312401. The next prime is 255312419. The reversal of 255312405 is 504213552.

It is a happy number.

255312405 is a `hidden beast` number, since 255 + 3 + 1 + 2 + 405 = 666.

It is not a de Polignac number, because 255312405 - 2² = 255312401 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255312401) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8895 + ... + 24284.

It is an arithmetic number, because the mean of its divisors is an integer number (12044340).

Almost surely, 2^255312405 is an apocalyptic number.

It is an amenable number.

255312405 is a deficient number, since it is larger than the sum of its proper divisors (226461195).

255312405 is a wasteful number, since it uses less digits than its factorization.

255312405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33215 (or 33206 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 255312405 is about 15978.4982085301. The cubic root of 255312405 is about 634.3914271916.

Adding to 255312405 its reverse (504213552), we get a palindrome (759525957).

The spelling of 255312405 in words is "two hundred fifty-five million, three hundred twelve thousand, four hundred five".