2051722173 has 8 divisors (see below), whose sum is σ = 2776460128. Its totient is φ = 1347399504.

The previous prime is 2051722171. The next prime is 2051722177. The reversal of 2051722173 is 3712271502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2051722173 - 2¹ = 2051722171 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2051722173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051722171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5103586 + ... + 5103987.

It is an arithmetic number, because the mean of its divisors is an integer number (347057516).

Almost surely, 2^2051722173 is an apocalyptic number.

It is an amenable number.

2051722173 is a deficient number, since it is larger than the sum of its proper divisors (724737955).

2051722173 is a wasteful number, since it uses less digits than its factorization.

2051722173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10207643.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 2051722173 is about 45295.9399173922. The cubic root of 2051722173 is about 1270.6897224853.

Adding to 2051722173 its reverse (3712271502), we get a palindrome (5763993675).

The spelling of 2051722173 in words is "two billion, fifty-one million, seven hundred twenty-two thousand, one hundred seventy-three".