210442134 has 32 divisors (see below), whose sum is σ = 501926400. Its totient is φ = 57511872.

The previous prime is 210442123. The next prime is 210442139. The reversal of 210442134 is 431244012.

210442134 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 210442134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210442139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107959 + ... + 109890.

It is an arithmetic number, because the mean of its divisors is an integer number (15685200).

Almost surely, 2^210442134 is an apocalyptic number.

210442134 is an abundant number, since it is smaller than the sum of its proper divisors (291484266).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210442134 is a wasteful number, since it uses less digits than its factorization.

210442134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217884.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 210442134 is about 14506.6237974244. The cubic root of 210442134 is about 594.8090473089.

Adding to 210442134 its reverse (431244012), we get a palindrome (641686146).

The spelling of 210442134 in words is "two hundred ten million, four hundred forty-two thousand, one hundred thirty-four".