212440233434 has 16 divisors (see below), whose sum is σ = 374370202080. Its totient is φ = 89135762160.

The previous prime is 212440233433. The next prime is 212440233443. The reversal of 212440233434 is 434332044212.

It is a super-2 number, since 2×212440233434² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212440233434.

It is not an unprimeable number, because it can be changed into a prime (212440233433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371398724 + ... + 371399295.

It is an arithmetic number, because the mean of its divisors is an integer number (23398137630).

Almost surely, 2^212440233434 is an apocalyptic number.

212440233434 is a deficient number, since it is larger than the sum of its proper divisors (161929968646).

212440233434 is a wasteful number, since it uses less digits than its factorization.

212440233434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742798045.

The product of its (nonzero) digits is 55296, while the sum is 32.

Adding to 212440233434 its reverse (434332044212), we get a palindrome (646772277646).

The spelling of 212440233434 in words is "two hundred twelve billion, four hundred forty million, two hundred thirty-three thousand, four hundred thirty-four".