2155261180 has 24 divisors (see below), whose sum is σ = 4527547920. Its totient is φ = 861818880.

The previous prime is 2155261123. The next prime is 2155261193. The reversal of 2155261180 is 811625512.

2155261180 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50395 + ... + 82765.

It is an arithmetic number, because the mean of its divisors is an integer number (188647830).

Almost surely, 2^2155261180 is an apocalyptic number.

2155261180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155261180 is an abundant number, since it is smaller than the sum of its proper divisors (2372286740).

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

2155261180 is a wasteful number, since it uses less digits than its factorization.

2155261180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35709 (or 35707 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 2155261180 is about 46424.7905757258. The cubic root of 2155261180 is about 1291.7147998065.

Adding to 2155261180 its reverse (811625512), we get a palindrome (2966886692).

The spelling of 2155261180 in words is "two billion, one hundred fifty-five million, two hundred sixty-one thousand, one hundred eighty".