1981103232 has 64 divisors (see below), whose sum is σ = 5272135200. Its totient is φ = 659134464.

The previous prime is 1981103221. The next prime is 1981103263. The reversal of 1981103232 is 2323011891.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 1981103232.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213963 + ... + 223029.

Almost surely, 2^1981103232 is an apocalyptic number.

1981103232 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 1981103232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2636067600).

1981103232 is an abundant number, since it is smaller than the sum of its proper divisors (3291031968).

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

1981103232 is an equidigital number, since it uses as much as digits as its factorization.

1981103232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9653 (or 9641 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 1981103232 is about 44509.5858439505. The cubic root of 1981103232 is about 1255.9404139582.

The spelling of 1981103232 in words is "one billion, nine hundred eighty-one million, one hundred three thousand, two hundred thirty-two".