2155523080 has 32 divisors (see below), whose sum is σ = 4918242240. Its totient is φ = 850064320.

The previous prime is 2155523063. The next prime is 2155523081. The reversal of 2155523080 is 803255512.

It is not an unprimeable number, because it can be changed into a prime (2155523081) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 376654 + ... + 382333.

It is an arithmetic number, because the mean of its divisors is an integer number (153695070).

Almost surely, 2^2155523080 is an apocalyptic number.

2155523080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155523080 is an abundant number, since it is smaller than the sum of its proper divisors (2762719160).

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

2155523080 is a wasteful number, since it uses less digits than its factorization.

2155523080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759069 (or 759065 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 2155523080 is about 46427.6111812788. The cubic root of 2155523080 is about 1291.7671192821.

Adding to 2155523080 its reverse (803255512), we get a palindrome (2958778592).

The spelling of 2155523080 in words is "two billion, one hundred fifty-five million, five hundred twenty-three thousand, eighty".