212540683 has 12 divisors (see below), whose sum is σ = 218189160. Its totient is φ = 207020352.

The previous prime is 212540639. The next prime is 212540689. The reversal of 212540683 is 386045212.

212540683 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-212540683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212540689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 507048 + ... + 507466.

It is an arithmetic number, because the mean of its divisors is an integer number (18182430).

Almost surely, 2^212540683 is an apocalyptic number.

212540683 is a deficient number, since it is larger than the sum of its proper divisors (5648477).

212540683 is an equidigital number, since it uses as much as digits as its factorization.

212540683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666 (or 599 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 212540683 is about 14578.7750857197. The cubic root of 212540683 is about 596.7796754762.

Adding to 212540683 its reverse (386045212), we get a palindrome (598585895).

The spelling of 212540683 in words is "two hundred twelve million, five hundred forty thousand, six hundred eighty-three".