211234440 has 32 divisors (see below), whose sum is σ = 633703680. Its totient is φ = 56329152.

The previous prime is 211234423. The next prime is 211234453. The reversal of 211234440 is 44432112.

It is a super-2 number, since 2×211234440² = 89239977284227200, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 880024 + ... + 880263.

It is an arithmetic number, because the mean of its divisors is an integer number (19803240).

Almost surely, 2^211234440 is an apocalyptic number.

211234440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211234440 is an abundant number, since it is smaller than the sum of its proper divisors (422469240).

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

211234440 is a wasteful number, since it uses less digits than its factorization.

211234440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760301 (or 1760297 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 211234440 is about 14533.9065636187. The cubic root of 211234440 is about 595.5545896641.

Adding to 211234440 its reverse (44432112), we get a palindrome (255666552).

The spelling of 211234440 in words is "two hundred eleven million, two hundred thirty-four thousand, four hundred forty".