210172140242 has 32 divisors (see below), whose sum is σ = 328426573104. Its totient is φ = 100785484800.

The previous prime is 210172140223. The next prime is 210172140313. The reversal of 210172140242 is 242041271012.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 95667961 + 210076472281 = 9781^2 + 458341^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9657998 + ... + 9679734.

Almost surely, 2^210172140242 is an apocalyptic number.

210172140242 is a deficient number, since it is larger than the sum of its proper divisors (118254432862).

210172140242 is a wasteful number, since it uses less digits than its factorization.

210172140242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23774.

The product of its (nonzero) digits is 1792, while the sum is 26.

The spelling of 210172140242 in words is "two hundred ten billion, one hundred seventy-two million, one hundred forty thousand, two hundred forty-two".