100018231 has 2 divisors, whose sum is σ = 100018232. Its totient is φ = 100018230.

The previous prime is 100018213. The next prime is 100018273. The reversal of 100018231 is 132810001.

Together with previous prime (100018213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100018231 - 2⁵ = 100018199 is a prime.

It is a super-2 number, since 2×100018231² = 20007293064738722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100018031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50009115 + 50009116.

It is an arithmetic number, because the mean of its divisors is an integer number (50009116).

Almost surely, 2^100018231 is an apocalyptic number.

100018231 is a deficient number, since it is larger than the sum of its proper divisors (1).

100018231 is an equidigital number, since it uses as much as digits as its factorization.

100018231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 100018231 is about 10000.9115084576. The cubic root of 100018231 is about 464.1870885827.

Adding to 100018231 its reverse (132810001), we get a palindrome (232828232).

The spelling of 100018231 in words is "one hundred million, eighteen thousand, two hundred thirty-one".