3981543100 has 72 divisors (see below), whose sum is σ = 9148008240. Its totient is φ = 1499950080.

The previous prime is 3981543067. The next prime is 3981543109. The reversal of 3981543100 is 13451893.

It is a super-2 number, since 2×3981543100² = 31705370914315220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3981543109) 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 23 ways as a sum of consecutive naturals, for example, 322644 + ... + 334756.

It is an arithmetic number, because the mean of its divisors is an integer number (127055670).

Almost surely, 2^3981543100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3981543100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4574004120).

3981543100 is an abundant number, since it is smaller than the sum of its proper divisors (5166465140).

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

3981543100 is a wasteful number, since it uses less digits than its factorization.

3981543100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12319 (or 12312 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 3981543100 is about 63099.4698868382. The cubic root of 3981543100 is about 1584.9557451645.

Adding to 3981543100 its reverse (13451893), we get a palindrome (3994994993).

The spelling of 3981543100 in words is "three billion, nine hundred eighty-one million, five hundred forty-three thousand, one hundred".