30721488313 has 8 divisors (see below), whose sum is σ = 31475212776. Its totient is φ = 29967974400.

The previous prime is 30721488299. The next prime is 30721488337. The reversal of 30721488313 is 31388412703.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 454883584 + 30266604729 = 21328^2 + 173973^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30721488313 - 2⁹ = 30721487801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30721480313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266145 + ... + 363697.

It is an arithmetic number, because the mean of its divisors is an integer number (3934401597).

Almost surely, 2^30721488313 is an apocalyptic number.

It is an amenable number.

30721488313 is a deficient number, since it is larger than the sum of its proper divisors (753724463).

30721488313 is an equidigital number, since it uses as much as digits as its factorization.

30721488313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105275.

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 30721488313 in words is "thirty billion, seven hundred twenty-one million, four hundred eighty-eight thousand, three hundred thirteen".