210104381 has 2 divisors, whose sum is σ = 210104382. Its totient is φ = 210104380.

The previous prime is 210104339. The next prime is 210104387. The reversal of 210104381 is 183401012.

210104381 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 can be written as a sum of positive squares in only one way, i.e., 208802500 + 1301881 = 14450^2 + 1141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210104381 is a prime.

It is a super-2 number, since 2×210104381² = 88287701830786322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210104387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105052190 + 105052191.

It is an arithmetic number, because the mean of its divisors is an integer number (105052191).

Almost surely, 2^210104381 is an apocalyptic number.

It is an amenable number.

210104381 is a deficient number, since it is larger than the sum of its proper divisors (1).

210104381 is an equidigital number, since it uses as much as digits as its factorization.

210104381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 210104381 is about 14494.9777854262. The cubic root of 210104381 is about 594.4906603160.

Adding to 210104381 its reverse (183401012), we get a palindrome (393505393).

The spelling of 210104381 in words is "two hundred ten million, one hundred four thousand, three hundred eighty-one".