212342645044 has 6 divisors (see below), whose sum is σ = 371599628834. Its totient is φ = 106171322520.

The previous prime is 212342645041. The next prime is 212342645051. The reversal of 212342645044 is 440546243212.

It can be written as a sum of positive squares in only one way, i.e., 203807102500 + 8535542544 = 451450^2 + 92388^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212342644994 and 212342645012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212342645041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26542830627 + ... + 26542830634.

Almost surely, 2^212342645044 is an apocalyptic number.

It is an amenable number.

212342645044 is a deficient number, since it is larger than the sum of its proper divisors (159256983790).

212342645044 is a wasteful number, since it uses less digits than its factorization.

212342645044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53085661265 (or 53085661263 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 37.

Adding to 212342645044 its reverse (440546243212), we get a palindrome (652888888256).

The spelling of 212342645044 in words is "two hundred twelve billion, three hundred forty-two million, six hundred forty-five thousand, forty-four".