2151180000 has 720 divisors, whose sum is σ = 8750261520. Its totient is φ = 497664000.

The previous prime is 2151179999. The next prime is 2151180011. The reversal of 2151180000 is 811512.

It is a tau number, because it is divible by the number of its divisors (720).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 58139982 + ... + 58140018.

It is an arithmetic number, because the mean of its divisors is an integer number (12153141).

Almost surely, 2^2151180000 is an apocalyptic number.

2151180000 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 2151180000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4375130760).

2151180000 is an abundant number, since it is smaller than the sum of its proper divisors (6599081520).

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

2151180000 is a wasteful number, since it uses less digits than its factorization.

2151180000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 2151180000 is about 46380.8149993076. The cubic root of 2151180000 is about 1290.8989587610.

Adding to 2151180000 its reverse (811512), we get a palindrome (2151991512).

The spelling of 2151180000 in words is "two billion, one hundred fifty-one million, one hundred eighty thousand".