100256281 has 12 divisors (see below), whose sum is σ = 103510512. Its totient is φ = 97088984.

The previous prime is 100256269. The next prime is 100256297. The reversal of 100256281 is 182652001.

It is not a de Polignac number, because 100256281 - 2⁷ = 100256153 is a prime.

It is a super-2 number, since 2×100256281² = 20102643759901922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100256381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 288750 + ... + 289096.

It is an arithmetic number, because the mean of its divisors is an integer number (8625876).

Almost surely, 2^100256281 is an apocalyptic number.

It is an amenable number.

100256281 is a deficient number, since it is larger than the sum of its proper divisors (3254231).

100256281 is an frugal number, since it uses more digits than its factorization.

100256281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548 (or 489 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 100256281 is about 10012.8058505096. The cubic root of 100256281 is about 464.5550621194. Note that the first 3 decimals are identical.

The spelling of 100256281 in words is "one hundred million, two hundred fifty-six thousand, two hundred eighty-one".