2155410100 has 72 divisors (see below), whose sum is σ = 4765007520. Its totient is φ = 846088320.

The previous prime is 2155410097. The next prime is 2155410107. The reversal of 2155410100 is 10145512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155410107) 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, 2605887 + ... + 2606713.

It is an arithmetic number, because the mean of its divisors is an integer number (66180660).

Almost surely, 2^2155410100 is an apocalyptic number.

2155410100 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 2155410100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2382503760).

2155410100 is an abundant number, since it is smaller than the sum of its proper divisors (2609597420).

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

2155410100 is a wasteful number, since it uses less digits than its factorization.

2155410100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297 (or 1290 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 2155410100 is about 46426.3944324777. The cubic root of 2155410100 is about 1291.7445499113.

Adding to 2155410100 its reverse (10145512), we get a palindrome (2165555612).

The spelling of 2155410100 in words is "two billion, one hundred fifty-five million, four hundred ten thousand, one hundred".