100315 has 4 divisors (see below), whose sum is σ = 120384. Its totient is φ = 80248.

The previous prime is 100313. The next prime is 100333. The reversal of 100315 is 513001.

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 100315 - 2¹ = 100313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10027 + ... + 10036.

It is an arithmetic number, because the mean of its divisors is an integer number (30096).

2¹⁰⁰³¹⁵ is an apocalyptic number.

100315 is a deficient number, since it is larger than the sum of its proper divisors (20069).

100315 is an equidigital number, since it uses as much as digits as its factorization.

100315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20068.

The product of its (nonzero) digits is 15, while the sum is 10.

The square root of 100315 is about 316.7254331436. The cubic root of 100315 is about 46.4645739347.

Adding to 100315 its reverse (513001), we get a palindrome (613316).

Subtracting 100315 from its reverse (513001), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 100315 in words is "one hundred thousand, three hundred fifteen".