209175242 has 16 divisors (see below), whose sum is σ = 335514312. Its totient is φ = 97459200.

The previous prime is 209175217. The next prime is 209175257. The reversal of 209175242 is 242571902.

It can be written as a sum of positive squares in 4 ways, for example, as 187169761 + 22005481 = 13681^2 + 4691^2 .

It is a junction number, because it is equal to n+sod(n) for n = 209175199 and 209175208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27023 + ... + 33890.

Almost surely, 2^209175242 is an apocalyptic number.

209175242 is a deficient number, since it is larger than the sum of its proper divisors (126339070).

209175242 is a wasteful number, since it uses less digits than its factorization.

209175242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61033.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 209175242 is about 14462.8918961596. The cubic root of 209175242 is about 593.6130319408.

The spelling of 209175242 in words is "two hundred nine million, one hundred seventy-five thousand, two hundred forty-two".