210100243 has 2 divisors, whose sum is σ = 210100244. Its totient is φ = 210100242.

The previous prime is 210100211. The next prime is 210100249. The reversal of 210100243 is 342001012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210100243 - 2⁵ = 210100211 is a prime.

It is a super-2 number, since 2×210100243² = 88284224217318098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (210100249) 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 as a sum of consecutive naturals, namely, 105050121 + 105050122.

It is an arithmetic number, because the mean of its divisors is an integer number (105050122).

Almost surely, 2^210100243 is an apocalyptic number.

210100243 is a deficient number, since it is larger than the sum of its proper divisors (1).

210100243 is an equidigital number, since it uses as much as digits as its factorization.

210100243 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 13.

The square root of 210100243 is about 14494.8350456292. The cubic root of 210100243 is about 594.4867574646.

Adding to 210100243 its reverse (342001012), we get a palindrome (552101255).

The spelling of 210100243 in words is "two hundred ten million, one hundred thousand, two hundred forty-three".