212011344 has 100 divisors (see below), whose sum is σ = 634894260. Its totient is φ = 68221440.

The previous prime is 212011339. The next prime is 212011357. The reversal of 212011344 is 443110212.

It can be written as a sum of positive squares in 2 ways, for example, as 174556944 + 37454400 = 13212^2 + 6120^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34764 + ... + 40404.

Almost surely, 2^212011344 is an apocalyptic number.

212011344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212011344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317447130).

212011344 is an abundant number, since it is smaller than the sum of its proper divisors (422882916).

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

212011344 is a wasteful number, since it uses less digits than its factorization.

212011344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5690 (or 5675 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 212011344 is about 14560.6093279093. The cubic root of 212011344 is about 596.2838309984.

Adding to 212011344 its reverse (443110212), we get a palindrome (655121556).

The spelling of 212011344 in words is "two hundred twelve million, eleven thousand, three hundred forty-four".