212002434 has 96 divisors (see below), whose sum is σ = 550682496. Its totient is φ = 59875200.

The previous prime is 212002433. The next prime is 212002447. The reversal of 212002434 is 434200212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212002433) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 343294 + ... + 343910.

It is an arithmetic number, because the mean of its divisors is an integer number (5736276).

Almost surely, 2^212002434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212002434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275341248).

212002434 is an abundant number, since it is smaller than the sum of its proper divisors (338680062).

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

212002434 is a wasteful number, since it uses less digits than its factorization.

212002434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 212002434 is about 14560.3033622243. The cubic root of 212002434 is about 596.2754777294.

Adding to 212002434 its reverse (434200212), we get a palindrome (646202646).

The spelling of 212002434 in words is "two hundred twelve million, two thousand, four hundred thirty-four".