1721305255 has 32 divisors (see below), whose sum is σ = 2160406080. Its totient is φ = 1315553280.

The previous prime is 1721305253. The next prime is 1721305273. The reversal of 1721305255 is 5525031271.

It is not a de Polignac number, because 1721305255 - 2¹ = 1721305253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1721305253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2127291 + ... + 2128099.

It is an arithmetic number, because the mean of its divisors is an integer number (67512690).

Almost surely, 2^1721305255 is an apocalyptic number.

1721305255 is a deficient number, since it is larger than the sum of its proper divisors (439100825).

1721305255 is a wasteful number, since it uses less digits than its factorization.

1721305255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 1721305255 is about 41488.6159687209. The cubic root of 1721305255 is about 1198.4482848576.

The spelling of 1721305255 in words is "one billion, seven hundred twenty-one million, three hundred five thousand, two hundred fifty-five".