2081857172 has 24 divisors (see below), whose sum is σ = 3764299392. Its totient is φ = 1006896800.

The previous prime is 2081857171. The next prime is 2081857199. The reversal of 2081857172 is 2717581802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081857171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54104 + ... + 84207.

It is an arithmetic number, because the mean of its divisors is an integer number (156845808).

Almost surely, 2^2081857172 is an apocalyptic number.

It is an amenable number.

2081857172 is a deficient number, since it is larger than the sum of its proper divisors (1682442220).

2081857172 is a wasteful number, since it uses less digits than its factorization.

2081857172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138439 (or 138437 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 41.

The square root of 2081857172 is about 45627.3730560943. The cubic root of 2081857172 is about 1276.8806636876.

The spelling of 2081857172 in words is "two billion, eighty-one million, eight hundred fifty-seven thousand, one hundred seventy-two".