210135194 has 4 divisors (see below), whose sum is σ = 315202794. Its totient is φ = 105067596.

The previous prime is 210135187. The next prime is 210135197. The reversal of 210135194 is 491531012.

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., 193627225 + 16507969 = 13915^2 + 4063^2 .

It is not an unprimeable number, because it can be changed into a prime (210135197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52533797 + ... + 52533800.

Almost surely, 2^210135194 is an apocalyptic number.

210135194 is a deficient number, since it is larger than the sum of its proper divisors (105067600).

210135194 is a wasteful number, since it uses less digits than its factorization.

210135194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105067599.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 210135194 is about 14496.0406318415. The cubic root of 210135194 is about 594.5197207053.

The spelling of 210135194 in words is "two hundred ten million, one hundred thirty-five thousand, one hundred ninety-four".