2155080000 has 140 divisors (see below), whose sum is σ = 7125594080. Its totient is φ = 574656000.

The previous prime is 2155079989. The next prime is 2155080017. The reversal of 2155080000 is 805512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 111021 + ... + 128979.

Almost surely, 2^2155080000 is an apocalyptic number.

2155080000 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 2155080000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3562797040).

2155080000 is an abundant number, since it is smaller than the sum of its proper divisors (4970514080).

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

2155080000 is an equidigital number, since it uses as much as digits as its factorization.

2155080000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17994 (or 17969 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 2155080000 is about 46422.8392065802. The cubic root of 2155080000 is about 1291.6786031964.

Adding to 2155080000 its reverse (805512), we get a palindrome (2155885512).

The spelling of 2155080000 in words is "two billion, one hundred fifty-five million, eighty thousand".