210505049 has 2 divisors, whose sum is σ = 210505050. Its totient is φ = 210505048.

The previous prime is 210505037. The next prime is 210505091. The reversal of 210505049 is 940505012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171217225 + 39287824 = 13085^2 + 6268^2 .

It is a cyclic number.

It is not a de Polignac number, because 210505049 - 2⁸ = 210504793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (210505019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105252524 + 105252525.

It is an arithmetic number, because the mean of its divisors is an integer number (105252525).

Almost surely, 2^210505049 is an apocalyptic number.

It is an amenable number.

210505049 is a deficient number, since it is larger than the sum of its proper divisors (1).

210505049 is an equidigital number, since it uses as much as digits as its factorization.

210505049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 210505049 is about 14508.7921275343. The cubic root of 210505049 is about 594.8683172561.

The spelling of 210505049 in words is "two hundred ten million, five hundred five thousand, forty-nine".