210240297 has 6 divisors (see below), whose sum is σ = 303680442. Its totient is φ = 140160192.

The previous prime is 210240271. The next prime is 210240307. The reversal of 210240297 is 792042012.

It can be written as a sum of positive squares in only one way, i.e., 156350016 + 53890281 = 12504^2 + 7341^2 .

It is not a de Polignac number, because 210240297 - 2¹⁹ = 209716009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210240297.

It is not an unprimeable number, because it can be changed into a prime (210240257) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11680008 + ... + 11680025.

It is an arithmetic number, because the mean of its divisors is an integer number (50613407).

Almost surely, 2^210240297 is an apocalyptic number.

It is an amenable number.

210240297 is a deficient number, since it is larger than the sum of its proper divisors (93440145).

210240297 is a wasteful number, since it uses less digits than its factorization.

210240297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23360039 (or 23360036 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 210240297 is about 14499.6654099327. The cubic root of 210240297 is about 594.6188241921.

The spelling of 210240297 in words is "two hundred ten million, two hundred forty thousand, two hundred ninety-seven".