211334442 has 48 divisors (see below), whose sum is σ = 482092128. Its totient is φ = 61246240.

The previous prime is 211334437. The next prime is 211334443. The reversal of 211334442 is 244433112.

It is not an unprimeable number, because it can be changed into a prime (211334443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31888 + ... + 37940.

It is an arithmetic number, because the mean of its divisors is an integer number (10043586).

Almost surely, 2^211334442 is an apocalyptic number.

211334442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 211334442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241046064).

211334442 is an abundant number, since it is smaller than the sum of its proper divisors (270757686).

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

211334442 is a wasteful number, since it uses less digits than its factorization.

211334442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6115 (or 6092 counting only the distinct ones).

The product of its digits is 2304, while the sum is 24.

The square root of 211334442 is about 14537.3464566268. The cubic root of 211334442 is about 595.6485567498.

Adding to 211334442 its reverse (244433112), we get a palindrome (455767554).

The spelling of 211334442 in words is "two hundred eleven million, three hundred thirty-four thousand, four hundred forty-two".