210442231 has 2 divisors, whose sum is σ = 210442232. Its totient is φ = 210442230.

The previous prime is 210442189. The next prime is 210442237. The reversal of 210442231 is 132244012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210442231 - 2⁷ = 210442103 is a prime.

It is a super-2 number, since 2×210442231² = 88571865176514722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210442199 and 210442208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210442237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105221115 + 105221116.

It is an arithmetic number, because the mean of its divisors is an integer number (105221116).

Almost surely, 2^210442231 is an apocalyptic number.

210442231 is a deficient number, since it is larger than the sum of its proper divisors (1).

210442231 is an equidigital number, since it uses as much as digits as its factorization.

210442231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 210442231 is about 14506.6271407243. The cubic root of 210442231 is about 594.8091386982.

Adding to 210442231 its reverse (132244012), we get a palindrome (342686243).

The spelling of 210442231 in words is "two hundred ten million, four hundred forty-two thousand, two hundred thirty-one".