100256287 has 4 divisors (see below), whose sum is σ = 104615280. Its totient is φ = 95897296.

The previous prime is 100256269. The next prime is 100256297. The reversal of 100256287 is 782652001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100256287 - 2¹⁹ = 99731999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100256207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2179462 + ... + 2179507.

It is an arithmetic number, because the mean of its divisors is an integer number (26153820).

Almost surely, 2^100256287 is an apocalyptic number.

100256287 is a deficient number, since it is larger than the sum of its proper divisors (4358993).

100256287 is an equidigital number, since it uses as much as digits as its factorization.

100256287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4358992.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 100256287 is about 10012.8061501259. The cubic root of 100256287 is about 464.5550713868. Note that the first 3 decimals are identical.

The spelling of 100256287 in words is "one hundred million, two hundred fifty-six thousand, two hundred eighty-seven".