3261100032 has 78 divisors (see below), whose sum is σ = 9419912112. Its totient is φ = 1087021056.

The previous prime is 3261100009. The next prime is 3261100033. The reversal of 3261100032 is 2300011623.

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

It is a junction number, because it is equal to n+sod(n) for n = 3261099978 and 3261100014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3261100033) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7368 + ... + 81095.

It is an arithmetic number, because the mean of its divisors is an integer number (120768104).

Almost surely, 2^3261100032 is an apocalyptic number.

3261100032 is a gapful number since it is divisible by the number (32) 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 3261100032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4709956056).

3261100032 is an abundant number, since it is smaller than the sum of its proper divisors (6158812080).

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

3261100032 is an equidigital number, since it uses as much as digits as its factorization.

3261100032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88493 (or 88468 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 3261100032 is about 57106.0419920695. The cubic root of 3261100032 is about 1482.9324667668.

Adding to 3261100032 its reverse (2300011623), we get a palindrome (5561111655).

The spelling of 3261100032 in words is "three billion, two hundred sixty-one million, one hundred thousand, thirty-two".