256306550 has 12 divisors (see below), whose sum is σ = 476730276. Its totient is φ = 102522600.

The previous prime is 256306513. The next prime is 256306613. The reversal of 256306550 is 55603652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2563016 + ... + 2563115.

It is an arithmetic number, because the mean of its divisors is an integer number (39727523).

Almost surely, 2^256306550 is an apocalyptic number.

256306550 is a deficient number, since it is larger than the sum of its proper divisors (220423726).

256306550 is a wasteful number, since it uses less digits than its factorization.

256306550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5126143 (or 5126138 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 32.

The square root of 256306550 is about 16009.5768213904. The cubic root of 256306550 is about 635.2137664572.

The spelling of 256306550 in words is "two hundred fifty-six million, three hundred six thousand, five hundred fifty".