210442399 has 2 divisors, whose sum is σ = 210442400. Its totient is φ = 210442398.

The previous prime is 210442313. The next prime is 210442411. The reversal of 210442399 is 993244012.

210442399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210442399 - 2¹⁵ = 210409631 is a prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210472399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105221199 + 105221200.

It is an arithmetic number, because the mean of its divisors is an integer number (105221200).

Almost surely, 2^210442399 is an apocalyptic number.

210442399 is a deficient number, since it is larger than the sum of its proper divisors (1).

210442399 is an equidigital number, since it uses as much as digits as its factorization.

210442399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 210442399 is about 14506.6329311801. The cubic root of 210442399 is about 594.8092969806.

The spelling of 210442399 in words is "two hundred ten million, four hundred forty-two thousand, three hundred ninety-nine".