100212543 has 24 divisors (see below), whose sum is σ = 147254016. Its totient is φ = 65664000.

The previous prime is 100212473. The next prime is 100212571. The reversal of 100212543 is 345212001.

100212543 is a `hidden beast` number, since 100 + 21 + 2 + 543 = 666.

It is not a de Polignac number, because 100212543 - 2¹⁰ = 100211519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100212583) 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 23 ways as a sum of consecutive naturals, for example, 166443 + ... + 167043.

It is an arithmetic number, because the mean of its divisors is an integer number (6135584).

Almost surely, 2^100212543 is an apocalyptic number.

100212543 is a deficient number, since it is larger than the sum of its proper divisors (47041473).

100212543 is a wasteful number, since it uses less digits than its factorization.

100212543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 100212543 is about 10010.6215091771. The cubic root of 100212543 is about 464.4874963949.

Adding to 100212543 its reverse (345212001), we get a palindrome (445424544).

The spelling of 100212543 in words is "one hundred million, two hundred twelve thousand, five hundred forty-three".