255306645 has 24 divisors (see below), whose sum is σ = 482762592. Its totient is φ = 123784800.

The previous prime is 255306643. The next prime is 255306677. The reversal of 255306645 is 546603552.

It is a happy number.

255306645 is a `hidden beast` number, since 2 + 5 + 5 + 3 + 0 + 6 + 645 = 666.

It is not a de Polignac number, because 255306645 - 2¹ = 255306643 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255306643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 257391 + ... + 258380.

It is an arithmetic number, because the mean of its divisors is an integer number (20115108).

Almost surely, 2^255306645 is an apocalyptic number.

It is an amenable number.

255306645 is a deficient number, since it is larger than the sum of its proper divisors (227455947).

255306645 is a wasteful number, since it uses less digits than its factorization.

255306645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515793 (or 515790 counting only the distinct ones).

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

The square root of 255306645 is about 15978.3179652928. The cubic root of 255306645 is about 634.3866564061.

The spelling of 255306645 in words is "two hundred fifty-five million, three hundred six thousand, six hundred forty-five".