2102155000 has 160 divisors (see below), whose sum is σ = 5523669360. Its totient is φ = 743040000.

The previous prime is 2102154959. The next prime is 2102155021. The reversal of 2102155000 is 5512012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2034484 + ... + 2035516.

Almost surely, 2^2102155000 is an apocalyptic number.

2102155000 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 2102155000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2761834680).

2102155000 is an abundant number, since it is smaller than the sum of its proper divisors (3421514360).

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

2102155000 is a wasteful number, since it uses less digits than its factorization.

2102155000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107 (or 1088 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 2102155000 is about 45849.2638981260. The cubic root of 2102155000 is about 1281.0170546166.

Adding to 2102155000 its reverse (5512012), we get a palindrome (2107667012).

The spelling of 2102155000 in words is "two billion, one hundred two million, one hundred fifty-five thousand".