212684543 has 4 divisors (see below), whose sum is σ = 212753640. Its totient is φ = 212615448.

The previous prime is 212684533. The next prime is 212684561. The reversal of 212684543 is 345486212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212684543 - 2⁸ = 212684287 is a prime.

It is a super-2 number, since 2×212684543² = 90469429662237698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212684533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29705 + ... + 36162.

It is an arithmetic number, because the mean of its divisors is an integer number (53188410).

Almost surely, 2^212684543 is an apocalyptic number.

212684543 is a deficient number, since it is larger than the sum of its proper divisors (69097).

212684543 is an equidigital number, since it uses as much as digits as its factorization.

212684543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69096.

The product of its digits is 46080, while the sum is 35.

The square root of 212684543 is about 14583.7081361360. The cubic root of 212684543 is about 596.9142902711.

The spelling of 212684543 in words is "two hundred twelve million, six hundred eighty-four thousand, five hundred forty-three".