212423404144 has 40 divisors (see below), whose sum is σ = 473182714368. Its totient is φ = 90493452480.

The previous prime is 212423404129. The next prime is 212423404147. The reversal of 212423404144 is 441404324212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212423404147) 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, 5659852 + ... + 5697259.

Almost surely, 2^212423404144 is an apocalyptic number.

It is an amenable number.

212423404144 is an abundant number, since it is smaller than the sum of its proper divisors (260759310224).

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

212423404144 is a wasteful number, since it uses less digits than its factorization.

212423404144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11357293 (or 11357287 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 212423404144 its reverse (441404324212), we get a palindrome (653827728356).

The spelling of 212423404144 in words is "two hundred twelve billion, four hundred twenty-three million, four hundred four thousand, one hundred forty-four".