1721216296 has 16 divisors (see below), whose sum is σ = 3234198240. Its totient is φ = 858763440.

The previous prime is 1721216279. The next prime is 1721216311. The reversal of 1721216296 is 6926121271.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226620 + ... + 234091.

It is an arithmetic number, because the mean of its divisors is an integer number (202137390).

Almost surely, 2^1721216296 is an apocalyptic number.

It is an amenable number.

1721216296 is a deficient number, since it is larger than the sum of its proper divisors (1512981944).

1721216296 is a wasteful number, since it uses less digits than its factorization.

1721216296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461184 (or 461180 counting only the distinct ones).

The product of its digits is 18144, while the sum is 37.

The square root of 1721216296 is about 41487.5438655990. The cubic root of 1721216296 is about 1198.4276387815.

The spelling of 1721216296 in words is "one billion, seven hundred twenty-one million, two hundred sixteen thousand, two hundred ninety-six".