100231 has 4 divisors (see below), whose sum is σ = 101232. Its totient is φ = 99232.

The previous prime is 100213. The next prime is 100237. The reversal of 100231 is 132001.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 100231 - 2⁷ = 100103 is a prime.

It is a super-2 number, since 2×100231² = 20092506722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331 + ... + 556.

It is an arithmetic number, because the mean of its divisors is an integer number (25308).

2¹⁰⁰²³¹ is an apocalyptic number.

100231 is a deficient number, since it is larger than the sum of its proper divisors (1001).

100231 is an equidigital number, since it uses as much as digits as its factorization.

100231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 100231 is about 316.5927984020. The cubic root of 100231 is about 46.4516010854.

Adding to 100231 its reverse (132001), we get a palindrome (232232).

The spelling of 100231 in words is "one hundred thousand, two hundred thirty-one".