256216600 has 24 divisors (see below), whose sum is σ = 595704060. Its totient is φ = 102486560.

The previous prime is 256216589. The next prime is 256216607. The reversal of 256216600 is 6612652.

256216600 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×256216600² = 131293892231120000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256216607) 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 5 ways as a sum of consecutive naturals, for example, 640342 + ... + 640741.

Almost surely, 2^256216600 is an apocalyptic number.

256216600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256216600 is an abundant number, since it is smaller than the sum of its proper divisors (339487460).

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

256216600 is a wasteful number, since it uses less digits than its factorization.

256216600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281099 (or 1281090 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 256216600 is about 16006.7673188561. The cubic root of 256216600 is about 635.1394489864.

The spelling of 256216600 in words is "two hundred fifty-six million, two hundred sixteen thousand, six hundred".