100018213 has 2 divisors, whose sum is σ = 100018214. Its totient is φ = 100018212.

The previous prime is 100018199. The next prime is 100018231. The reversal of 100018213 is 312810001.

Together with next prime (100018231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96491329 + 3526884 = 9823^2 + 1878^2 .

It is a cyclic number.

It is not a de Polignac number, because 100018213 - 2¹³ = 100010021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100018273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50009106 + 50009107.

It is an arithmetic number, because the mean of its divisors is an integer number (50009107).

Almost surely, 2^100018213 is an apocalyptic number.

It is an amenable number.

100018213 is a deficient number, since it is larger than the sum of its proper divisors (1).

100018213 is an equidigital number, since it uses as much as digits as its factorization.

100018213 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 100018213 is about 10000.9106085396. The cubic root of 100018213 is about 464.1870607365.

Adding to 100018213 its reverse (312810001), we get a palindrome (412828214).

The spelling of 100018213 in words is "one hundred million, eighteen thousand, two hundred thirteen".