210423194 has 4 divisors (see below), whose sum is σ = 315634794. Its totient is φ = 105211596.

The previous prime is 210423151. The next prime is 210423203. The reversal of 210423194 is 491324012.

210423194 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 110523169 + 99900025 = 10513^2 + 9995^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52605797 + ... + 52605800.

Almost surely, 2^210423194 is an apocalyptic number.

210423194 is a deficient number, since it is larger than the sum of its proper divisors (105211600).

210423194 is a wasteful number, since it uses less digits than its factorization.

210423194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105211599.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 210423194 is about 14505.9709774975. The cubic root of 210423194 is about 594.7912023062.

The spelling of 210423194 in words is "two hundred ten million, four hundred twenty-three thousand, one hundred ninety-four".