255366405 has 32 divisors (see below), whose sum is σ = 518841600. Its totient is φ = 116738496.

The previous prime is 255366383. The next prime is 255366407. The reversal of 255366405 is 504663552.

It is a happy number.

255366405 is a `hidden beast` number, since 2 + 5 + 5 + 3 + 6 + 640 + 5 = 666.

It is not a de Polignac number, because 255366405 - 2⁷ = 255366277 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 255366405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255366407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134170 + ... + 136059.

It is an arithmetic number, because the mean of its divisors is an integer number (16213800).

Almost surely, 2^255366405 is an apocalyptic number.

It is an amenable number.

255366405 is an abundant number, since it is smaller than the sum of its proper divisors (263475195).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255366405 is a wasteful number, since it uses less digits than its factorization.

255366405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270250 (or 270244 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The square root of 255366405 is about 15980.1878900093. The cubic root of 255366405 is about 634.4361498157.

The spelling of 255366405 in words is "two hundred fifty-five million, three hundred sixty-six thousand, four hundred five".