211431433404 has 24 divisors (see below), whose sum is σ = 493364027520. Its totient is φ = 70473713584.

The previous prime is 211431433373. The next prime is 211431433457. The reversal of 211431433404 is 404334134112.

211431433404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165624 + ... + 671039.

It is an arithmetic number, because the mean of its divisors is an integer number (20556834480).

Almost surely, 2^211431433404 is an apocalyptic number.

It is an amenable number.

211431433404 is an abundant number, since it is smaller than the sum of its proper divisors (281932594116).

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

211431433404 is a wasteful number, since it uses less digits than its factorization.

211431433404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857729 (or 857727 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 211431433404 its reverse (404334134112), we get a palindrome (615765567516).

The spelling of 211431433404 in words is "two hundred eleven billion, four hundred thirty-one million, four hundred thirty-three thousand, four hundred four".