211020340 has 12 divisors (see below), whose sum is σ = 443142756. Its totient is φ = 84408128.

The previous prime is 211020311. The next prime is 211020343. The reversal of 211020340 is 43020112.

211020340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 64416676 + 146603664 = 8026^2 + 12108^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 211020340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211020343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5275489 + ... + 5275528.

It is an arithmetic number, because the mean of its divisors is an integer number (36928563).

Almost surely, 2^211020340 is an apocalyptic number.

211020340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211020340 is an abundant number, since it is smaller than the sum of its proper divisors (232122416).

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

211020340 is a wasteful number, since it uses less digits than its factorization.

211020340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10551026 (or 10551024 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 211020340 is about 14526.5391611354. The cubic root of 211020340 is about 595.3533103947.

Adding to 211020340 its reverse (43020112), we get a palindrome (254040452).

The spelling of 211020340 in words is "two hundred eleven million, twenty thousand, three hundred forty".