256206550 has 12 divisors (see below), whose sum is σ = 476544276. Its totient is φ = 102482600.

The previous prime is 256206547. The next prime is 256206563. The reversal of 256206550 is 55602652.

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, 2562016 + ... + 2562115.

It is an arithmetic number, because the mean of its divisors is an integer number (39712023).

Almost surely, 2^256206550 is an apocalyptic number.

256206550 is a deficient number, since it is larger than the sum of its proper divisors (220337726).

256206550 is a wasteful number, since it uses less digits than its factorization.

256206550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5124143 (or 5124138 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 256206550 is about 16006.4533860565. The cubic root of 256206550 is about 635.1311445090.

The spelling of 256206550 in words is "two hundred fifty-six million, two hundred six thousand, five hundred fifty".