4821356721 has 8 divisors (see below), whose sum is σ = 6434788320. Its totient is φ = 3211081472.

The previous prime is 4821356719. The next prime is 4821356731. The reversal of 4821356721 is 1276531284.

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 4821356721 - 2¹ = 4821356719 is a prime.

It is a super-2 number, since 2×4821356721² = 46490961262263743682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4821356721.

It is not an unprimeable number, because it can be changed into a prime (4821356711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 785520 + ... + 791633.

It is an arithmetic number, because the mean of its divisors is an integer number (804348540).

Almost surely, 2^4821356721 is an apocalyptic number.

It is an amenable number.

4821356721 is a deficient number, since it is larger than the sum of its proper divisors (1613431599).

4821356721 is a wasteful number, since it uses less digits than its factorization.

4821356721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578175.

The product of its digits is 80640, while the sum is 39.

The square root of 4821356721 is about 69435.9900987953. The cubic root of 4821356721 is about 1689.3634287756.

The spelling of 4821356721 in words is "four billion, eight hundred twenty-one million, three hundred fifty-six thousand, seven hundred twenty-one".