52721365051 has 4 divisors (see below), whose sum is σ = 53947443352. Its totient is φ = 51495286752.

The previous prime is 52721365043. The next prime is 52721365069. The reversal of 52721365051 is 15056312725.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 52721365051 - 2³ = 52721365043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52721365051.

It is not an unprimeable number, because it can be changed into a prime (52721365351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 613039086 + ... + 613039171.

It is an arithmetic number, because the mean of its divisors is an integer number (13486860838).

Almost surely, 2^52721365051 is an apocalyptic number.

52721365051 is a deficient number, since it is larger than the sum of its proper divisors (1226078301).

52721365051 is a wasteful number, since it uses less digits than its factorization.

52721365051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226078300.

The product of its (nonzero) digits is 63000, while the sum is 37.

Adding to 52721365051 its reverse (15056312725), we get a palindrome (67777677776).

The spelling of 52721365051 in words is "fifty-two billion, seven hundred twenty-one million, three hundred sixty-five thousand, fifty-one".