1721344475 has 12 divisors (see below), whose sum is σ = 2134981656. Its totient is φ = 1376743680.

The previous prime is 1721344423. The next prime is 1721344483. The reversal of 1721344475 is 5744431271.

It is not a de Polignac number, because 1721344475 - 2¹⁰ = 1721343451 is a prime.

It is a super-2 number, since 2×1721344475² = 5926053603226051250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 201899 + ... + 210251.

It is an arithmetic number, because the mean of its divisors is an integer number (177915138).

Almost surely, 2^1721344475 is an apocalyptic number.

1721344475 is a deficient number, since it is larger than the sum of its proper divisors (413637181).

1721344475 is an equidigital number, since it uses as much as digits as its factorization.

1721344475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16606 (or 16601 counting only the distinct ones).

The product of its digits is 94080, while the sum is 38.

The square root of 1721344475 is about 41489.0886258062. The cubic root of 1721344475 is about 1198.4573870170.

The spelling of 1721344475 in words is "one billion, seven hundred twenty-one million, three hundred forty-four thousand, four hundred seventy-five".