100543212 has 288 divisors, whose sum is σ = 352235520. Its totient is φ = 23379840.

The previous prime is 100543181. The next prime is 100543213. The reversal of 100543212 is 212345001.

100543212 is a `hidden beast` number, since 100 + 543 + 21 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100543213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1211323 + ... + 1211405.

It is an arithmetic number, because the mean of its divisors is an integer number (1223040).

Almost surely, 2^100543212 is an apocalyptic number.

100543212 is a gapful number since it is divisible by the number (12) 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 100543212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176117760).

100543212 is an abundant number, since it is smaller than the sum of its proper divisors (251692308).

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

100543212 is a wasteful number, since it uses less digits than its factorization.

100543212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 148 counting only the distinct ones).

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

The square root of 100543212 is about 10027.1238149332. The cubic root of 100543212 is about 464.9978217033.

Adding to 100543212 its reverse (212345001), we get a palindrome (312888213).

The spelling of 100543212 in words is "one hundred million, five hundred forty-three thousand, two hundred twelve".