2055172729 has 4 divisors (see below), whose sum is σ = 2055266676. Its totient is φ = 2055078784.

The previous prime is 2055172681. The next prime is 2055172739. The reversal of 2055172729 is 9272715502.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 559417104 + 1495755625 = 23652^2 + 38675^2 .

It is a cyclic number.

It is not a de Polignac number, because 2055172729 - 2²⁹ = 1518301817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2055172691 and 2055172700.

It is not an unprimeable number, because it can be changed into a prime (2055172739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5037 + ... + 64309.

It is an arithmetic number, because the mean of its divisors is an integer number (513816669).

Almost surely, 2^2055172729 is an apocalyptic number.

It is an amenable number.

2055172729 is a deficient number, since it is larger than the sum of its proper divisors (93947).

2055172729 is an equidigital number, since it uses as much as digits as its factorization.

2055172729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93946.

The product of its (nonzero) digits is 88200, while the sum is 40.

The square root of 2055172729 is about 45334.0129373079. The cubic root of 2055172729 is about 1271.4016659151.

The spelling of 2055172729 in words is "two billion, fifty-five million, one hundred seventy-two thousand, seven hundred twenty-nine".