2131204806 has 48 divisors (see below), whose sum is σ = 4867153200. Its totient is φ = 672110784.

The previous prime is 2131204753. The next prime is 2131204807. The reversal of 2131204806 is 6084021312.

It is a self number, because there is not a number n which added to its sum of digits gives 2131204806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131204807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 279760 + ... + 287276.

It is an arithmetic number, because the mean of its divisors is an integer number (101399025).

Almost surely, 2^2131204806 is an apocalyptic number.

2131204806 is an abundant number, since it is smaller than the sum of its proper divisors (2735948394).

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

2131204806 is a wasteful number, since it uses less digits than its factorization.

2131204806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8373 (or 8370 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 2131204806 is about 46164.9738004908. The cubic root of 2131204806 is about 1286.8908973066.

The spelling of 2131204806 in words is "two billion, one hundred thirty-one million, two hundred four thousand, eight hundred six".