210256256 has 64 divisors (see below), whose sum is σ = 488580000. Its totient is φ = 90091008.

The previous prime is 210256231. The next prime is 210256259. The reversal of 210256256 is 652652012.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210256259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41510 + ... + 46298.

Almost surely, 2^210256256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210256256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244290000).

210256256 is an abundant number, since it is smaller than the sum of its proper divisors (278323744).

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

210256256 is an frugal number, since it uses more digits than its factorization.

210256256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4824 (or 4798 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 210256256 is about 14500.2157225332. The cubic root of 210256256 is about 594.6338693283.

The spelling of 210256256 in words is "two hundred ten million, two hundred fifty-six thousand, two hundred fifty-six".