211030340 has 48 divisors (see below), whose sum is σ = 469022400. Its totient is φ = 79535232.

The previous prime is 211030331. The next prime is 211030349. The reversal of 211030340 is 43030112.

It is an interprime number because it is at equal distance from previous prime (211030331) and next prime (211030349).

It is not an unprimeable number, because it can be changed into a prime (211030349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73451 + ... + 76269.

It is an arithmetic number, because the mean of its divisors is an integer number (9771300).

Almost surely, 2^211030340 is an apocalyptic number.

211030340 is a gapful number since it is divisible by the number (20) 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 211030340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234511200).

211030340 is an abundant number, since it is smaller than the sum of its proper divisors (257992060).

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

211030340 is a wasteful number, since it uses less digits than its factorization.

211030340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3044 (or 3042 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 211030340 is about 14526.8833546635. The cubic root of 211030340 is about 595.3627146052.

Adding to 211030340 its reverse (43030112), we get a palindrome (254060452).

The spelling of 211030340 in words is "two hundred eleven million, thirty thousand, three hundred forty".