2051657173 has 2 divisors, whose sum is σ = 2051657174. Its totient is φ = 2051657172.

The previous prime is 2051657149. The next prime is 2051657197. The reversal of 2051657173 is 3717561502.

It is a balanced prime because it is at equal distance from previous prime (2051657149) and next prime (2051657197).

It can be written as a sum of positive squares in only one way, i.e., 1882084689 + 169572484 = 43383^2 + 13022^2 .

It is a cyclic number.

It is not a de Polignac number, because 2051657173 - 2⁹ = 2051656661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2051657273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025828586 + 1025828587.

It is an arithmetic number, because the mean of its divisors is an integer number (1025828587).

Almost surely, 2^2051657173 is an apocalyptic number.

It is an amenable number.

2051657173 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051657173 is an equidigital number, since it uses as much as digits as its factorization.

2051657173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 2051657173 is about 45295.2224081083. Note that the first 3 decimals coincide. The cubic root of 2051657173 is about 1270.6763035625.

The spelling of 2051657173 in words is "two billion, fifty-one million, six hundred fifty-seven thousand, one hundred seventy-three".