212131431444 has 24 divisors (see below), whose sum is σ = 494996463808. Its totient is φ = 70707173760.

The previous prime is 212131431443. The next prime is 212131431527. The reversal of 212131431444 is 444134131212.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212131431443) 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, 138037 + ... + 665820.

Almost surely, 2^212131431444 is an apocalyptic number.

It is an amenable number.

212131431444 is an abundant number, since it is smaller than the sum of its proper divisors (282865032364).

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

212131431444 is a wasteful number, since it uses less digits than its factorization.

212131431444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825855 (or 825853 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

Adding to 212131431444 its reverse (444134131212), we get a palindrome (656265562656).

The spelling of 212131431444 in words is "two hundred twelve billion, one hundred thirty-one million, four hundred thirty-one thousand, four hundred forty-four".