2133155100 has 72 divisors (see below), whose sum is σ = 6181948080. Its totient is φ = 567918080.

The previous prime is 2133155071. The next prime is 2133155107. The reversal of 2133155100 is 15513312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2133155107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 190456 + ... + 201344.

It is an arithmetic number, because the mean of its divisors is an integer number (85860390).

Almost surely, 2^2133155100 is an apocalyptic number.

2133155100 is a gapful number since it is divisible by the number (20) 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 2133155100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3090974040).

2133155100 is an abundant number, since it is smaller than the sum of its proper divisors (4048792980).

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

2133155100 is a wasteful number, since it uses less digits than its factorization.

2133155100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11559 (or 11552 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 2133155100 is about 46186.0920624380. The cubic root of 2133155100 is about 1287.2833279775.

Adding to 2133155100 its reverse (15513312), we get a palindrome (2148668412).

The spelling of 2133155100 in words is "two billion, one hundred thirty-three million, one hundred fifty-five thousand, one hundred".