3199742721 has 48 divisors (see below), whose sum is σ = 5478989568. Its totient is φ = 1761264000.

The previous prime is 3199742653. The next prime is 3199742723. The reversal of 3199742721 is 1272479913.

It is not a de Polignac number, because 3199742721 - 2²¹ = 3197645569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3199742723) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 228636 + ... + 242226.

It is an arithmetic number, because the mean of its divisors is an integer number (114145616).

Almost surely, 2^3199742721 is an apocalyptic number.

It is an amenable number.

3199742721 is a deficient number, since it is larger than the sum of its proper divisors (2279246847).

3199742721 is a wasteful number, since it uses less digits than its factorization.

3199742721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13742 (or 13739 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 3199742721 is about 56566.2684026443. The cubic root of 3199742721 is about 1473.5731057335.

The spelling of 3199742721 in words is "three billion, one hundred ninety-nine million, seven hundred forty-two thousand, seven hundred twenty-one".