2131664180 has 12 divisors (see below), whose sum is σ = 4476494820. Its totient is φ = 852665664.

The previous prime is 2131664177. The next prime is 2131664201. The reversal of 2131664180 is 814661312.

It can be written as a sum of positive squares in 2 ways, for example, as 1501252516 + 630411664 = 38746^2 + 25108^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53291585 + ... + 53291624.

It is an arithmetic number, because the mean of its divisors is an integer number (373041235).

Almost surely, 2^2131664180 is an apocalyptic number.

2131664180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131664180 is an abundant number, since it is smaller than the sum of its proper divisors (2344830640).

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

2131664180 is a wasteful number, since it uses less digits than its factorization.

2131664180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106583218 (or 106583216 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 2131664180 is about 46169.9488845288. The cubic root of 2131664180 is about 1286.9833523267.

The spelling of 2131664180 in words is "two billion, one hundred thirty-one million, six hundred sixty-four thousand, one hundred eighty".