52210065721 has 8 divisors (see below), whose sum is σ = 56992709088. Its totient is φ = 47433468000.

The previous prime is 52210065703. The next prime is 52210065751. The reversal of 52210065721 is 12756001225.

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 52210065721 - 2⁵ = 52210065689 is a prime.

It is a super-2 number, since 2×52210065721² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52210065751) 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, 1493340 + ... + 1527901.

It is an arithmetic number, because the mean of its divisors is an integer number (7124088636).

Almost surely, 2^52210065721 is an apocalyptic number.

It is an amenable number.

52210065721 is a deficient number, since it is larger than the sum of its proper divisors (4782643367).

52210065721 is a wasteful number, since it uses less digits than its factorization.

52210065721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3022823.

The product of its (nonzero) digits is 8400, while the sum is 31.

Adding to 52210065721 its reverse (12756001225), we get a palindrome (64966066946).

The spelling of 52210065721 in words is "fifty-two billion, two hundred ten million, sixty-five thousand, seven hundred twenty-one".