211431344 has 40 divisors (see below), whose sum is σ = 433670160. Its totient is φ = 99687168.

The previous prime is 211431317. The next prime is 211431347. The reversal of 211431344 is 443134112.

211431344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (211431347) 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, 14654 + ... + 25250.

It is an arithmetic number, because the mean of its divisors is an integer number (10841754).

Almost surely, 2^211431344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211431344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216835080).

211431344 is an abundant number, since it is smaller than the sum of its proper divisors (222238816).

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

211431344 is a wasteful number, since it uses less digits than its factorization.

211431344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10677 (or 10671 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 211431344 is about 14540.6789387566. The cubic root of 211431344 is about 595.7395826394.

Adding to 211431344 its reverse (443134112), we get a palindrome (654565456).

The spelling of 211431344 in words is "two hundred eleven million, four hundred thirty-one thousand, three hundred forty-four".