210306242 has 4 divisors (see below), whose sum is σ = 315459366. Its totient is φ = 105153120.

The previous prime is 210306241. The next prime is 210306277. The reversal of 210306242 is 242603012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 199685161 + 10621081 = 14131^2 + 3259^2 .

It is not an unprimeable number, because it can be changed into a prime (210306241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52576559 + ... + 52576562.

Almost surely, 2^210306242 is an apocalyptic number.

210306242 is a deficient number, since it is larger than the sum of its proper divisors (105153124).

210306242 is a wasteful number, since it uses less digits than its factorization.

210306242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105153123.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 210306242 is about 14501.9392496314. The cubic root of 210306242 is about 594.6809880427.

Adding to 210306242 its reverse (242603012), we get a palindrome (452909254).

It can be divided in two parts, 21030 and 6242, that added together give a palindrome (27272).

The spelling of 210306242 in words is "two hundred ten million, three hundred six thousand, two hundred forty-two".