210630242 has 4 divisors (see below), whose sum is σ = 315945366. Its totient is φ = 105315120.

The previous prime is 210630229. The next prime is 210630269. The reversal of 210630242 is 242036012.

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., 195412441 + 15217801 = 13979^2 + 3901^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52657559 + ... + 52657562.

Almost surely, 2^210630242 is an apocalyptic number.

210630242 is a deficient number, since it is larger than the sum of its proper divisors (105315124).

210630242 is a wasteful number, since it uses less digits than its factorization.

210630242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105315123.

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

The square root of 210630242 is about 14513.1058702126. The cubic root of 210630242 is about 594.9862219346.

Adding to 210630242 its reverse (242036012), we get a palindrome (452666254).

The spelling of 210630242 in words is "two hundred ten million, six hundred thirty thousand, two hundred forty-two".