210040249 has 2 divisors, whose sum is σ = 210040250. Its totient is φ = 210040248.

The previous prime is 210040241. The next prime is 210040261. The reversal of 210040249 is 942040012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208600249 + 1440000 = 14443^2 + 1200^2 .

It is a cyclic number.

It is not a de Polignac number, because 210040249 - 2³ = 210040241 is a prime.

It is not a weakly prime, because it can be changed into another prime (210040241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105020124 + 105020125.

It is an arithmetic number, because the mean of its divisors is an integer number (105020125).

Almost surely, 2^210040249 is an apocalyptic number.

It is an amenable number.

210040249 is a deficient number, since it is larger than the sum of its proper divisors (1).

210040249 is an equidigital number, since it uses as much as digits as its factorization.

210040249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 210040249 is about 14492.7654020894. The cubic root of 210040249 is about 594.4301669639.

The spelling of 210040249 in words is "two hundred ten million, forty thousand, two hundred forty-nine".