100256501 has 2 divisors, whose sum is σ = 100256502. Its totient is φ = 100256500.

The previous prime is 100256417. The next prime is 100256503. The reversal of 100256501 is 105652001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51466276 + 48790225 = 7174^2 + 6985^2 .

It is a cyclic number.

It is not a de Polignac number, because 100256501 - 2¹⁴ = 100240117 is a prime.

Together with 100256503, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100256503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50128250 + 50128251.

It is an arithmetic number, because the mean of its divisors is an integer number (50128251).

Almost surely, 2^100256501 is an apocalyptic number.

It is an amenable number.

100256501 is a deficient number, since it is larger than the sum of its proper divisors (1).

100256501 is an equidigital number, since it uses as much as digits as its factorization.

100256501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 100256501 is about 10012.8168364352. The cubic root of 100256501 is about 464.5554019221. Note that the first 3 decimals are identical.

The spelling of 100256501 in words is "one hundred million, two hundred fifty-six thousand, five hundred one".