211443342 has 64 divisors (see below), whose sum is σ = 472780800. Its totient is φ = 62506080.

The previous prime is 211443329. The next prime is 211443371. The reversal of 211443342 is 243344112.

It is a super-2 number, since 2×211443342² = 89416573752257928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 557709 + ... + 558087.

It is an arithmetic number, because the mean of its divisors is an integer number (7387200).

Almost surely, 2^211443342 is an apocalyptic number.

211443342 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 211443342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236390400).

211443342 is an abundant number, since it is smaller than the sum of its proper divisors (261337458).

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

211443342 is a wasteful number, since it uses less digits than its factorization.

211443342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581.

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

The square root of 211443342 is about 14541.0914996090. The cubic root of 211443342 is about 595.7508511489.

Adding to 211443342 its reverse (243344112), we get a palindrome (454787454).

The spelling of 211443342 in words is "two hundred eleven million, four hundred forty-three thousand, three hundred forty-two".