256207216 has 10 divisors (see below), whose sum is σ = 496401512. Its totient is φ = 128103600.

The previous prime is 256207183. The next prime is 256207243. The reversal of 256207216 is 612702652.

256207216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8006460 + ... + 8006491.

Almost surely, 2^256207216 is an apocalyptic number.

It is an amenable number.

256207216 is a deficient number, since it is larger than the sum of its proper divisors (240194296).

256207216 is a wasteful number, since it uses less digits than its factorization.

256207216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16012959 (or 16012953 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 256207216 is about 16006.4741901519. The cubic root of 256207216 is about 635.1316948422.

Adding to 256207216 its reverse (612702652), we get a palindrome (868909868).

The spelling of 256207216 in words is "two hundred fifty-six million, two hundred seven thousand, two hundred sixteen".