2051728173 has 24 divisors (see below), whose sum is σ = 3264431040. Its totient is φ = 1231392960.

The previous prime is 2051728171. The next prime is 2051728199. The reversal of 2051728173 is 3718271502.

It is not a de Polignac number, because 2051728173 - 2¹ = 2051728171 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051728171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90408 + ... + 110801.

It is an arithmetic number, because the mean of its divisors is an integer number (136017960).

Almost surely, 2^2051728173 is an apocalyptic number.

It is an amenable number.

2051728173 is a deficient number, since it is larger than the sum of its proper divisors (1212702867).

2051728173 is a wasteful number, since it uses less digits than its factorization.

2051728173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201329 (or 201326 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 2051728173 is about 45296.0061484454. The cubic root of 2051728173 is about 1270.6909611408.

Adding to 2051728173 its reverse (3718271502), we get a palindrome (5769999675).

The spelling of 2051728173 in words is "two billion, fifty-one million, seven hundred twenty-eight thousand, one hundred seventy-three".