210981241 has 2 divisors, whose sum is σ = 210981242. Its totient is φ = 210981240.

The previous prime is 210981179. The next prime is 210981247. The reversal of 210981241 is 142189012.

210981241 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., 195888016 + 15093225 = 13996^2 + 3885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210981241 is a prime.

It is equal to p_11652670 and since 210981241 and 11652670 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (210981247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105490620 + 105490621.

It is an arithmetic number, because the mean of its divisors is an integer number (105490621).

Almost surely, 2^210981241 is an apocalyptic number.

It is an amenable number.

210981241 is a deficient number, since it is larger than the sum of its proper divisors (1).

210981241 is an equidigital number, since it uses as much as digits as its factorization.

210981241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 210981241 is about 14525.1933205724. The cubic root of 210981241 is about 595.3165380202.

The spelling of 210981241 in words is "two hundred ten million, nine hundred eighty-one thousand, two hundred forty-one".