212023444240 has 20 divisors (see below), whose sum is σ = 492954508044. Its totient is φ = 84809377664.

The previous prime is 212023444229. The next prime is 212023444249. The reversal of 212023444240 is 42444320212.

It can be written as a sum of positive squares in 2 ways, for example, as 26834371344 + 185189072896 = 163812^2 + 430336^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 212023444199 and 212023444208.

It is not an unprimeable number, because it can be changed into a prime (212023444249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1325146447 + ... + 1325146606.

Almost surely, 2^212023444240 is an apocalyptic number.

212023444240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212023444240 is an abundant number, since it is smaller than the sum of its proper divisors (280931063804).

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

212023444240 is a wasteful number, since it uses less digits than its factorization.

212023444240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2650293066 (or 2650293060 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 212023444240 its reverse (42444320212), we get a palindrome (254467764452).

The spelling of 212023444240 in words is "two hundred twelve billion, twenty-three million, four hundred forty-four thousand, two hundred forty".